06-01-2018, 07:56 AM
That would be David Frush. Scroll down the page at this link for his email and other vendors of knobs.
http://philcoradio.com/phorum/showthread.php?tid=14950
Don't know if he is still in business or not.
http://philcoradio.com/phorum/showthread.php?tid=14950
Don't know if he is still in business or not.