Just thinking about gear dilemma.......Try a machine shop or someone machining for hobby for possible gear replacement. Also check with local clock shops/private clock repairman. You may need to get metal version w/same teeth & size or custom make. The only real concern would be, is nylon gear meshing w/other nylon gears?? IF so, plastic only replacement would not prematurely wear out other nylon gears??? If only nylon gear in tuner assembly, a metal replacement should not wear out other metal gears as long as mounted as old one and fits properly. Try custom knob makers too , to mold possible replacement .Good Luck. Being creative of course helps. Butcher sets on these I'm sure are somewhat rare.
