I was planning on using 18ga 2"X2" angle but had trouble locating any.
Instead we used a scrap piece of 3/4" EMT conduit.
Good thing too, the bumper is a continuous radius that would've been very difficult to bend with the angle.
After installing it we found no kickers were needed as it was very stiff from the curve ( as Euromodder said )
Once again pictures had to wait until dark.