There is a DVD on the torrent site Cinemageddon:

Somewhat over a year ago i received a fan edited dvd of "Return of The Living Dead" It contained the fullscreen cut of the film as well as 5 different versions of the soundtrack,

The un altered Theatrical version missing from the 2002 DVD,
A unofficial mix,
1991 2.0 Stereo HBO version,
The Butchered 2002 version
Directors Commentary

I myself re cut this fan edit got rid of the full screen version and replaced it with the Widescreen transfer as well as throwing in the Spanish soundtrack . Everything is synced up perfectly

I previously uploaded the entire official DVD release collection of the Return of The Living Dead series. Minus the fan edits of course

The description 'fan edit' is misleading. As far as I can tell, it is just a reauthoring with 5 audio tracks.

From the comments there, it looks like you may already know this. Is there a reason this source would be unacceptable for the audio?