Idiot Breaks His own tach! Who rebuilds tach's?

I'm an idiot. My tach was reading too high ( twice the RPM's )so I pulled it out, Bought one of those Actron meters that reads RPM. Had everything hooked up to match up and adjust the tach. While trying to adjust I slipped with the screwdriver and knocked the needle loose off of the tach center spindle. It's still hooked on but floats around. Even while adjusting I could not get it even close to right so I think something else is wrong. Does anyone know who rebuild tachs. This is a Tick Toc tach from a 68. I have the clock out and the tach free from the instrument cluster.

Thanks
Ray