Not everything on that list was necessarily gold; The "Mexican melodrama" project is one I read while at the Lilly, and it looks to all intents and purposes to be something Welles was going to produce for Dolores del Rio to star in, with Norman Foster to direct. There is paperwork to that effect. The script itself, not written by Welles, is fairly lame. It's exactly what the title says it is. As for Way to Santiago, it had promise, but needed a good deal of work. It's too dated to film now without extensive revisions which would defeat the purpose of filming a Welles script. It has a comedy scene with American tourists on a bus that would have been great had it been filmed, though. To answer the question above, none of the projects listed are online, or we'd know about them. There are excerpts from Salome in the Maurice Bessy book, though.