This weekend I finally installed a bluetooth receiver that I've had for about a year.
I used a Sure Electronics 4.0 receiver, and stuffed it in the dash.
https://www.parts-express.com/sure-electronics-aa-ab41136-bluetooth-40-audio-receiver-board-aptx--edr-12-vdc--320-351#!
Happy with how it works so far. I used one of the connectors for the stock NAV to power it, and RCAs to connect it to my radio.