I bought one of these and ended up going in a different direction. It's new in the package. I got the '05-'06 variant. I'll send it for the cost of shipping, which should be pretty cheap.
I'm preparing to flat tow for the first time. Here's where I am so far:
Blue Ox tow bar w/D-ring adapters (feeling confident enough in the aftermarket bumper for this) on a 6" receiver riser
BrakeBuddy
I'm using the 7-pin harness and I'll be wiring the power & ground to a fused SAE plug in...