I don't know anything about TR but there are a ton of people who cut out the steel rings even a couple venders on this forum... Do you need someone to weld them on for you or what?
I'm looking to do an aluminum outter ring, and want the weld on ring to have the anti coning lip as well. I can do the welding thats not really the issue.
Probably cheapest to have myself or Dave at D&J Custom Design cut you out some steel inner rings and some custom aluminum outer rings if thats what you want.