1950s Magnificent Magnavox HI-FI Console issues

[Electronic M]

If you can't fix the busted wafer, but know which contacts make and break at each setting, then you could adapt another wafer switch with enough contacts, or take one with less contacts and use it to control some relays (the contacts of which would duplicate the behavior of the original switches' contacts).

Rotary wafer switches are one of those things you don't want to ever break as repair/replacement is rarely easy/simple.

As for the knob: have you considered stealing the spring clip/retainer/shaft grabber off a random junk knod meant for the same type shaft and gluing it into the old knob.....Hell if the plastic shaft of the damaged knob is thich enough you might be able to make it into a set screw.

This should teach you a lesson NOT to force knobs. I destroyed a wafer switch once by forcing a knob....The lesson I learned from that I will never forget.