If you have a Synology NAS and use Safari's "Add to Dock" feature for your DSM, I threw together a quick icon for it.
There's probably better ones out there, but I did a quick search and didn't see anything so I just created this one. Figured I'd share it.
@mark Hi Mark, this is a superb icon! 💅
I actually liked it that much that I decided to upscale it to 1024x1024 and make an .ICNS out of it, hope that's alright.
The link to get the ICNS: https://drive.proton.me/urls/JR7DVHEM2C#YMzVbl33GWqa
Thanks again!
Mark Jardine 
Jochem