Somewhere, someone finally made this and I think it's beautiful: https://www.thingiverse.com/thing:4687836
Ethernet | RJ45 clip to secure/repair/fix broken tab by guss67

This clip was design to fix/repair/secure the broken or loose tab of a RJ45 Ethernet connector and avoid crimping. Designed to prevent from moving, wiggling, falling from the connector and easy to install.UPDATE v.4.9 | 28/01/2021Added the 3 following files which have slightly wider body (0.25mm) than 4.7 version and small upgrade on the tip.1. "4.9.nf.supported" (extension) comes "with supports" for the ones are not very familiar with. But I still prefer S3D's supports.2. "4.9.nf" (extension) with "no fillet", to make it easier printing with supports.3. "4.9" (extension) with fillet, for "smooth edges". On FDM printers isn't that much noticeable.UPDATE v.4.7 | 01/01/2021Added another version with "no fillet" (".nf" extension), actually it has sharp edges to make it easier printing with supports.PrintingSuggested printing orientation is the one as the files are stored, why?Printing the tab from the base to the tip in X-Y axis makes it stronger and more flexible since its printed in one continued string.If you change the orientation with the tip on top then tab's base will start from the bottom and builds up while the Z axis is sticking the rest of it till the tip. With this orientation the tab has more possibilities to brake since Z layers don't bond the same as the method I suggested.*If you have another solution let me know.Supports Supports needed and you need to be experienced with good slicer settings. Also attention needed when removing them from the actual print.Or you can print the file with "4.9.nf.supported" (extension) which comes with supports. But I still prefer S3D's supports.Installation note:1.Before install the "printed clip" check the left overs of the broken tab. If it is too long the tip of the "printed clip" might not click underneath the left-over. So, I suggest to leave a length of the broken tab about "0,5-1,0mm". If the broken tad left-over is to small or cuted flash then the printed one might not click and hopefully that would work well, haven't tested that scenario.2.Follow the sketches to install the "printed clip", also while sliding in if you find it a bit hard some wiggling might help.*You may call it the "ScorpioNet" or "Devil's Network Tail"! Designed in InventorIf you enjoy and want to support my work you can donate me on the link below,Thank you!

Thingiverse - Digital Designs for Physical Objects
@roipoussiere Having printed and used some, I can confirm they work, but only when the face of the socket is flush with the case of the product. When it's too far inside, like on old Macbooks, it doesn't work at all
@roipoussiere our savior has descended onto earth 
@roipoussiere anyone in Switzerland! lmk if you need one, i'd be happy to print and ship it to you 
@nekomata I don't need it now, but thank you so much for the proposal! 

@roipoussiere

That is absolutely wonderful!

@emacsen @roipoussiere C'est vraiment top !

@crakdown @roipoussiere

If I ever think for a moment that I could catch up to my 40 years of not speaking French anymore, "top"- is that an adjective in French now?

Why not put it in verlan and then it can be "pot"... then it can be even harder to understand....

@emacsen @roipoussiere Sorry to say what I think about this object in my mother tongue.
Yes "top" is a common word today and people who often speak French will understand this.
I dont't understand why I must write "pot" instead of "top" but why not.

C'est vraiment pot 😍

Have a good day

@crakdown @roipoussiere

You may not be aware, but I'm Parisian, I just don't have virtually any French anymore. I'm very non-fluent :(

I was joking that if French has verlan, and French is borrowing English words (though in an odd way) and I know that Verlan-of-English words is a thing, why not make it even more confusing :)

Top (as used there) is not English, nor is "Pressing" or other "words in English" that appear in French.

@roipoussiere @rick
You can also look for "DeLOCK 86420" for example in your favorite Amazon if printing is not an option
@roipoussiere I printed and used it.
It stucks on the port. Very hard to pull out... 😢

@roipoussiere Well, You need a 3D printer.

It's way more easier to use zip ties, You just need the right size.

https://www.instructables.com/Repair-a-Broken-Ethernet-Plug/

Repair a Broken Ethernet Plug

Repair a Broken Ethernet Plug: The locking tab of RJ45 plugs breaks very easily. Replace it by two nylon cable ties (aka zip ties), in minutes. IMPORTANT NOTES: - This must be regarded as a temporary "Mac Gyver" solution, for home usage. - Definitely not for IT staff! (no crimpe…

Instructables
@devnull @roipoussiere
24 minutes to print, then test with an ethernet cable and the network adapter of the Wii.
@roipoussiere excellent, now I have a legitimate reason to buy a 3d printer!
@roipoussiere might be cheaper to get a new cable than print. how much is it to 3d print this, ballpark? I don't have a printer
@vera this is a very tiny platic part, you could easily print a dozen in a single 3d printer plate. So probably a few cents in plastic and energy consumption.
@roipoussiere wanted to try from metal but the laser cutter at the fablab doesn't do metal…
@roipoussiere Why isn't this a product already? We have so many useless plastic thingies. But something useful as this? Of course not!
@attilakinali @roipoussiere You can in fact buy these things: search for "rj45 replacement clip", "rj45 repair clip", or (in German) "rj45 rastnasen".
@roipoussiere That alone is enough reason to justify a 3d printer.
RJ45 replacement in two parts [stronger] by TaicheeKan

This is a remix from https://www.thingiverse.com/thing:4757607 I made it by using PLA but the ring part was broken due to the thinness of the upper (near the clip) line. So I added same total thickness as side wall lines there. it's solved. Now this model has incredible strength. Great thanks for original ideas.

@roipoussiere Thanks, I know what to print tomorrow
@roipoussiere Someone, please sell me this!
@roipoussiere stupidly simple! Love it!
@roipoussiere Oh, brilliant! Thanks for sharing!
@roipoussiere ironically, the Ethernet cable I'm using to network my 3D-printer has a broken tab. Time for some more meta-printing!
@roipoussiere fantastic, so many cables have been thrown away :-/
@roipoussiere omg! I need to print 100,000 of these right now!
@roipoussiere Now the big question, how's it compare resource-wise with snipping the end and recapping? My initial guess is that this wins because you're not losing copper and the other innards, while the material in this is probably roughly equivalent to the plastic end. Are they snug when they click in, or does that depend on the printer?
@mason @roipoussiere Pretty sure once you consider the packaging material, shipping logistics, and other overhead for the replacement ends (especially in low quantity), this is a huge win.
@roipoussiere @dalias Do you mean if you already have a 3D printer? Very similar otherwise. I am interested in getting into 3D printing but I haven't yet. Suggestions? My only hard requirement is that it be entirely usable with a free software workstation, and ideally with whatever design and control software it requires being free software. (Thanks in advance!)