'59 Standard Heater Knob

[Tod59]

Hey Guys-

Could use some assistance:

My '59 standard heater control knob is stripped out. I recently restored my heater (works great now, nice and warm in the cab), but the knob turns loosely on the shaft and doesn't always turn the shaft to adjust the heater speed. In attached picture on upper left side you can see the knob I'm looking for.

The catalogs all sell repo deluxe heater knobs (the small knobs), but who sells a standard heater knob? Can't find one anywhere!! Or, any advice on how to fix mine without epoxying it to shaft?

Thanks Fella's
Tod59