I look at it this way. The max payload capacity is 1600#. Whether you put it in the back of the TC or put it on a trailer behind the TC, the engine and drivetrain still has to pull the same amount of weight.
thehitchstore.com has a complete package for the TC. Receiver, ball mount, ball and wiring kit. I'm getting mine in the next couple months.
I've ordered 2 sets of hitch packages from them for other vehicles in the past and they've always had great parts and service.