To Zander and Alpha Charlie echo...
The unit I purchased is a RB2 model which is a non nav unit. I don't have the need for a nav unit nor could I justify the extra $$$ for it. I can have my phone blue tooth to the headunit via the u connect module and give me directions through the stereo while streaming my music.. Add a windscreen mount for the phone and I got nav.
As for the camera. I purchased thee gebuine jeep one. Part number is AUSJKRECAMKIT
Is has full directions and is pretty much plug and play setup. The only things that aren't is jeep have to activate it in the headunit and the power supply has to be tapped into an ignition source.
I have attached a pic of the plug for the rear of the headunit as I think this could be done by activating the headunit the purchasing a cheap camera and cable and running it into the back of the headunit. It could probably be done for under $100 including jeep activating it and the camera itself.
White was video signal
Black was video return
Shield was the shield for the camera cable