I had Metal Line, in Salt Lake, match the radius of the Jeep's rear corners with 3/16". More of a roll than a bend and not as thick as you're looking but they did a great job and might be worth a call to see if they can do it.
I took in a piece of 1" x 1/8" thick (I think) aluminum that I bent around the body of the Jeep. I left enough on the one end to get to the tailgate opening and just told them how far to take the other end. I then cut out my wheel openings where I wanted,
along with the door opening. I just had them do it in the height of the Jeep body. I essentially had them build me a full length body armor "blank". Hope that makes sense.