Pipe bender

How did you make the dies? I have a plan to make some for accessories for the 4x4, and so far I was going to use the ball turning jig on the lathe to make the concave forms, then cut the part in half to make the semi-circle. Just looking for some other ideas.

...not meaning to hijack the thread...

2 pieces 3/8" flat stock cut to shape, 1 1/2" inner flat stock x 3 /16ths" bend to the shape of inner radius, weld a pass into the corners with the wirefeed, then 2 more passes with the wirefeed to give the corners the proper shape to hold the pipe without it denting. Final Grind internal welds to smooth to fit finish.