Hey Brother my name is Carlos AponteOh interesting.
The rear wheel bearings set the preload with a crush sleeve.
From that thread it looks like they figured out a 7.5" solid pinion spacer might work.
Though I see no mention of the min OD that will still fit over the hub.
Hard to say if a 30mm solid spacer will fit without modification over the hub.
Even if you used a solid spacer when doing new rear wheel bearings I don't expect many shops willing to put in the time to install correctly.
They would need to dissassemble and re-assemble at least a couple times to get the correct shim stack and measure preload.
Setting up a solid spacer correctly is quite time consuming, but once you get it...man is it good.