I would just rent a Conduit bender and use conduit (****ty to weld). Unless you plan on ramming other vehicles with your Boz bumper.
Rent a 3/4" or 1" pipe bender and buy some pipe.
Use a vice with an oxy-acetylene tourch.
Or build a jig and use the oxy-acetylene.

Or make a drawing and give it to me, I'll get you a quote. Or depending on how much I hate my job this week I may be able to do it in return for beer.