Thanks all for the replies. Looks like there is interest in this area. Encouraged so I have ordered some gray and clear filament.
Knobs I need I would like to print:
Volts/div for vertical amps
Volts/div for a 2215
Volts/div for a 465B
These would be printed in two parts, the gray knob and the clear skirt, then heat welded together.
As mentioned in the other thread, I have a friend with an industrial lathe that might help me make some aluminum ring inserts.
Source knobs for Vertical amps
position knob for a 087-0537-01 Signal Standardizer
Frequency variable knob for an SG503 leveled sine wave generator
and possibly others.