He asked, I could not help him, don't have a way to roll the tubing.Try Russ, he makes stuff for Vans----maybe the sticks??
http://www.vansairforce.com/community/member.php?u=2228
you have to be careful of the dies you use, and how much of a bend you make. You can kink the tube---which is bad.
It seems that one might be able to mitigate the tendency of a tube to kink while bending it by first filling it with sand. I've never bent tube before though....
If I am not mistaken Garrett (Honeywell) does not allow the use of Cerrobend anymore.