I wanted to propose this project for a long while, though. This, and maybe re-created Robotech the Movie with Megazone. Though, I guess we'd need to find the Japanese LD with the newly animated footage for the ending.
The R0 bootleg of DYRL you mention is the result of some fans getting in contact with the bootleggers and working with them to give them a decent script, etc. As far as bootlegs go, it's very good. The font is like Times New Roman instead of arial though, right? They also did the same thing with Read or Die, and something else I can't recall.
I'm surprised no one ever did a preservation of Castle of Cagliostro's Streamline dub. From what I hear, it's far superior than the new Manga one, if only for the fact that that version is loaded with cussing, and the original isn't. The original also has Bob Bergen (the current voice of Porky Pig) as Lupin. That's not as weird as it sounds. It's my favorite: I imported the Disney R2 of it just so I could get that dub. Did anyone ever suceed in syncing the Streamline Akira with the current R1?
And... I always wanted to see the DP fandubs. I have a copy of 'This is Otakudom' somewhere.