On both my '96 P38 back in the day, and my son's new '07, they both have come equipped already with the receiver.   So we just needed a hitch.   The thing I found is that in order to preserve departure angles, the received is tucked waaaaay under there.    Instead of being able to use my other hitches that I use with my other trucks, I had to get an "extended" hitch.   Nothing special, except it's about 4" longer than the typical hitch ball assembly.    I want to say it was more like $70 and I ordered it from an auto parts store.