You can always make them. Some people bend cold, I heat them up first. Also, the one piece Whizzer pedal cranks are wider then standard, but I think the offset is mostly on the Whizzer clutch side. You'll need to know your needed I.D. before ordering anything.
Pat
Here is a one piece crank bent by hand. Well, by hand using a torch and a nice big cheater piece of pipe and a bench mounted vice. 9 1/2" I.D. Bending cranks and getting them straight is a pain. Some come out better than others.
Pat