How long has it been on 99.9%? Still a chance you just need to wait for someone to turn on their computer?

If I can’t get an audiobook specifically I usually mark it as a request in the Libby app and hope the library will purchase some licenses. Does your library offer similar services?

To answer your original question though I don’t generally buy stuff I’ve failed to torrent. I intermittently search for it again unless I forget about it though.