What would you think of brazing? It would be softer material and drill easier than the original metal and should cut straighter. I have thought about the JB Weld fix as well since it does have the majority of the circumference left for strength. I’m probably overthinking it and the bushing itself without doing anything would be just fine.

Larry
Old man᠁Old truck᠁neither one goes very fast. All you need in life is TIME, PATIENCE and MONEY.
If you are missing one component, you'll need an abundance of the others two.