Just in time for the collapse of Gainax, a new version of Diacon III (1981), scanned from the 8mm release, has been uploaded to archive.org:

https://archive.org/details/zgfpy29uigxsba

And to complete the set, here's a laserdisc Domesday Duplicator remaster of Diacon IV (1983), dropped a couple months ago:

https://archive.org/details/DAICONIVREMASTER

Unless an in-house remaster or 8mm reel of IV suddenly appears, these are probably the best versions we'll see of either.

#Anime