Re: Printing Tek knobs
Perhaps you found the small knobs already, but for others as well:
I just printed a bunch of the small knobs Tek # 366-0636-00 using this design file:
Tektronix 2225 Oscilloscope control knob by faultedlogic on Thingiverse: https://www.thingiverse.com/thing:4111558
I used treatstock.com to find a printing service, and printed in Resin. If you find someone with gray resin, that's great. Mine were clear, but will paint them.