Disc brake conversion wheel hub sizing

Scarebird isn't going to have the hubs. They recommend that you separate the drum
from the Hub and press in new studs.

Look at you hub/drum on the drum side, where the
studs come through. If they are still "swedged" together, that will need to be removed and the assembly will separate.

I've read using a 5/8 hole saw to cut the swedge.

I have scarebird brakes on the front of mine and it all works well together, just be sure to get quality calipers (Napa).
I've been doing a bunch of googling and it really looks like those hubs are not made or available anymore which is a bummer. Yup, I've been reading posts on how to separate the hub from the drum, doesn't seem to bad.
It's just, what do you do when the hub eventually goes bad?