Hey dude 😃
I don’t know how many exactly, but you can check this thread here to some nice info: https://originaltrilogy.com/topic/An-Index-and-Help-Thread-for-Star-Wars-Fan-Edits-and-Other-Projects-/id/59793
There are some skilled editors working in different versions, Hal, Dominic, Movies Remastered, etc, and you can find them easily on the topics page.