Since about 25% of my neck is held together by titanium plates and screws, backing up can be a real [insert explative here]. If I didn't love my CRD so much, I'd trade for one of the 2007 Grand Cherokees with the nav unit and reverse / backup camera.
There is a company you can find at
http://TVandNav2Go.com. They modify various nav units to accept another video input - specifically a reverse camera that operates when the car is put into reverse, changing the screen display to whatever is behind the truck.
Has anyone had any experience with these folks? They charge $450 to modify the unit. I found them on the Chrysler 300C & SRT forum.
Thanks.