As one of those evil mechanical engineer types, here's my advice: Get a BFH, large lever bar, large vice, come-along winch gear, whatever it takes and bend that hitch into shape. I would suggest bending the hitch and not the frame though. A bit of heating may help too. You are not going to loose any significant strength bending it into shape, may even work harden it a little bit. The important thing is to have the hitch ball straight up and down, regardless of any other fitment issues.

I have a U-haul receiver because it was half the cost of the Isuzu one, and while it has taken a bit of clearance away from the back decent angle, it is also a really tough piece of metal that has probable prevented me from tearing off my rear bumper a couple of times off road.

Looked into the trailer wiring yet? I have two items from U-haul that I used on my 95.5, which has a trailer wire connection on the factory harness. (The U-haul guy didn't know that and was about to start splicing wires before I stopped him). Anyway, I have one bracket mounted plug that has a combo 4-way flat and U-haul type individual bullet connectors, and I have a 7-way round connector bracket mounted, which plugs into the 4-way flat. The 4-way flat is for my boat trailer, the 7-way round is for my tent trailer, and the U-haul connector is for when I rent their utility trailers to haul stuff to the dump. The largest reason I keep my Rodeo is to haul trailers, and its done a fantastic job over the last 168K miles...

Good luck!