What about a Scion head unit? Much better than the stock LX head unit, has iPod/iPhone integration (if you get the right model), inexpensive (got mine for $60), and appear as OEM. Here is my install thread for my LX450: https://forum.ih8mud.com/80-series-tech/531547-definitive-scion-hu-into-lx-450-setup-thread.html
Good luck!
Good luck!