i made the reciever hitch for my 64 c20 at the same time i made the wrecker bed, towing cradle, and rear bumper. i used super heavy duty channel iron that fit around the rear frame. i bent the rear brackets on my 66 years ago towing a bobcat. i see bumpers all the time tilted down from too much tounge weight. i think you can bil your own that will be much stronger than you could ever buy. you can buy reciever tubes from a trailer supply. you can save a lot of $$$$, just mine isn't powder coated.