Welcome to the forums.
There are many fan edits. Star Wars Revisited is considered the best of the bunch.
The original trilogy is only available used at this point (on both DVD and LD). You might be interested in some of the preservation efforts you can find in the appropriate forum on this very site. They are actually the best quality releases of the original films. The preservation efforts by the members Harmy and DarkJedi are considered the cream of the crop.
Cheers.