Unknown style and make rear bumper

[TurboJim]

Well for starters let's specify the vehicle: my 1989 chevrolet R3500 crew cab. My problem is this giant chrome rear bumper the truck has:


I want to replace it as it was damaged and "straightened" before i bought it so its pretty mangled (pics might not show damage very well)  does anyone know who built this rear bumper or where i could get one? I don't really want to change to another style as it already has the drop hitch designed for this bumper.

THANKS!