As far as I know, all copies circulating of the alternate ending are pretty poor quality - a combination of being sourced from an old VCR taping of a cable airing, and most bootleg DVDs featuring it having both versions of the films squished into one DVD-R.

And a little request to TheCassidy: if it's you coming up with the cover art to this, any chance you'll be using this poster art as the front cover?

http://eu.movieposter.com/posters/archive/main/9/A70-4870

All the eBay bootleg DVDs use the "zombie at the window" art, and it would be nice to set this apart from them in terms of look.