I just bought a 2012 ram 2500 and was wondering if the 6.5 touch screen out of any other dodge product would fit. I loved My touch screen in my 2011 1500... You can find them on eBay at a decent price.
You need to watch the High Speed CAN bus VS the Low Speed Can Bus stuff. A high speed bus vehicle doesnt work with a low speed radio, and vice versa. Lots of info on it over at the Jeep WK website here. http://wkjeeps.com/wk_nav_2.htm