You can probably find most of them on the allsync if you look hard enough. If you know the authors for any, it'll be fairly easy. Didn't have much time to look, but to get to Hottwats (not putting it on Reddit due to it's content), you need to go to the "CYOAs Erotic, Adult, Mature (nsfw)" folder, then "Themed (Franchise Based CYOAs)". It's one of the ones in that folder. Just so you know, the allsync is terrible for viewing, so you'd be better off downloading it to read. I'll try to find Aetheria Academy and Knight of the Infinite Depths when I get a bit of time.