I'd been looking for Persian audiobooks for a few years too. There are a few on archive.org, like
https://archive.org/details/ShabhayePis ... oinPersian , and a bilingual English/Persian book on Librivox:
https://librivox.org/the-rubaiyat-of-om ... r-khayyam/The goldmine, though, is also the first hit on google for the query "persian audioboks":
http://audiolib.ir/ . They're low-bitrate and the quality isn't fantastic, but there are well over a hundred audiobooks, of both original Persian and translated literature. It's a .ir domain, so the lack of clear statements about licensing/copyright aren't an issue, as
Iran has no bilateral agreement on copyright with the rest of the world.