My uncle and I made a brake. works good enough for us anyway. It only has two major flaws
1)is with the current set up we can't bend anything over 90 deg.
2) due to the length and not supporting it in the center, bending a long piece of steel a slightly different bend radius in the middle that the outsides. For any thing smaller than 2 feet theough you can't tell it.
All we did was take two pieces of 4"x4" 8ft long angle iron and welded on brackets to make the one pivot about the center of the other. We welded on a small stand at each end of the stationary piece to sit on a bench top or the floor.
To hold the steel we vis grip or c-clamp a piece of half inch steel on top of the pieces.
TO actually bend it we never got around to welding on the handle we get out the 24" pipe wrench and torque it over.
Crude and redneck, but it works.