It was made in the US by a small fabrication place over there, it wasn't a one off but he did have to wait a bit for it to get done. It had a mounting bracket that sandwiched between the hitch and frame, the bar bolted separately to this. The side protection had to have two additional holes drilled either side for them to mount. Here's the few pics I took with the phone.
You can see the two bolts going through the holes we drilled to mount the side plates
Chris will probably remember more
Cheers
Steve