Somebody in the Robert Anton Wilson Fans facebook group linked to his google drive folder, which is full of lunatic-fringe texts. Most of it is occult (he's definitely a Crowley collector), but there's a variety of esoterica, including a fair amount of RAW. I found some obscure Gurdjieff-related books in there too.
Mainly putting this here so I can find it later :fnord:
https://drive.google.com/drive/folders/1Wus6qiqdvdCcvN9Tdthi2M3hKNrXpA6F
Oooh. I've been meaning to read several of these. Thanks!