Yeh, for legal reasons they can't host them there. Sometimes they'll have someone leaving links in the comment sections, but often the only way to get them is being on boring cliquey forums.
Torrents sometimes have them if you know how to look but rarely have people seeding it if it's more than a few years old.
Fan edits are a weird thing, if there's enough footage in good quality then some people are able to get notoriously hacked up movies and get them as close to the original shooting script as the director/writer had originally intended it to be viewed. I haven't seen many of them, but one I quite liked was the Q2 fanedit of "Fire Walk With Me" which doubles the run time and actually makes it great viewing for between the 2nd and 3rd season.