Back on subject of cruise control, there is a kit for it. I was looking into it and seem to remember $150 from a dealer on line. I believe you replace the plastic blanks on the steering wheel and they plug into a harness already there.

 

http://www.mnrelectronics.com/chjecrco.html

 

The part number is 82209241 and is running about $220. google "82209241 control"

http://www.dodgepartsworld.com/PD-82209241.aspx