Not sure you can have Ram do it and intergrate it into your EVIC, but you can always ask a dealer if they can.
If you don't want to go the dealer route you can find plenty of kits from $40 to $200 depending on how far you want to go. Rear only or front and rear for park assist. If you want chrome sensors they are available from some suppliers. Check Ebay or Amazon or do a search on the web. Chrome sensors http://www.sonicelectronix.com/item_...7C-Chrome.html
It is not hard to drill your own as the kits provide a hole saw. The biggest problem is lining them up and spacing them properly.
Tape off the bumper and measure then mark the location. Check alignment and location as many times as you feel comfortable, once drilled it is drilled. Punch the centers of the holes and drill pilot holes before using the hole saw. Treat the drilled metal so it won't rust, insert sensors, run wires to cab, hook up wires, find a location you like for the display unit, that's it.