I guess I'm lucky. I have a "parts" Ammco which is drum only (no disc gearbox) and a "working one" that won't stay in gear, I have to hold it in. But I have a lot of cones and the big cups, as well as the small tapered shaft for stuff like the old VW tapered drums etc. I have maybe 500 in the whole mess. Don't use it much
I'd be happy to turn some, but shipping is a killer
There are rotor lathes for "on the car" but I've never understood how they could be precision enough, with any play in the wheel bearings