As far as I know,the dealer is the only place to get one.They have to update your computer to make it work.Cost me $330.00 canadian.It doesnt like my tent trailer braking system,it tells me the trailer isnt there when I can clearly see it in my mirror.
I got mine from these people thru ebay. They are a Dodge dealer and mine came with the bezels and everything I needed. I installed it and the dealer flashed the computer during the next service visit. It works really good, actually better than anything I've used to date.