Great buy! I laughed a bit because literally all of the issues you described, I have been through and done. I recommend the OEM aux cord kit, p/n 82110149390. It's cheap, and with a bluetooth audio adapter, it's a perfect setup.

Compass mirrors are PnP. I found mine at a pull-a-part from a 2006, and paid $5 for it.

MID pixels were a big hit to the wallet. I think I paid $800 for a new unit after getting fed up buying used ones that didn't work.