Best place for rear step bumpers?

[chevymotocross]

I have an 87 silverado. It has the nicer looking "sport" bumper, no step. Problem is, I race motocross, and I really want to use the motorcycle trailer I have. After looking and searching, there is no way a trailer hitch will mount to the frame, without removing the spare tire, which I won't do. My only other option is a step bumper. The chrome step bumpers look pretty good. LMC has them for $250. Any other recommended places to buy a chrome bumper? I will look used as well but would like something nice and shiny, not old and rusty.