If you make your installation as much like your friernd's truck as possible, I think you have a good chance of solving the problem without changing radios.
I found a lot of links to the Hitec 2.4 module but all say 'out of stock' until late February (which may really mean July).
One link
http://www3.omnimodels.com/cgi-bin/w...I=HRCL4100&P=0