Funny how I finally see this thread. I've recently thought about doing something similar by finding a bluetooth aux receiver so I can plug it into my aux input. I've been looking at eBay ones like this:

A2DP Wireless Bluetooth 3 0 Stereo Music Audio Receiver for Car Aux Home Speaker | eBay

I like the battery on it so I can run no wires at all. Just hook it up in the glove box and tuck it away.

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