Shifter threads

Appreciate everyones input. Yes threads are now smaller because the chrome shop chased them incorrectly. Provided new photo if that helps. 3/8"NF OD is .370 while the current OD on shaft is .330. The difference is small but important. My original idea of epoxy to make up the difference I thought could work if I could find a release agent to first coat the threads of the knob, fill it with epoxy and let it harden on the stick, then unscrew it after hardening. The trouble with that idea is that I don't know of any release agent. Maybe someone out there knows how to do this. Or maybe I'm completely wrong. Help!