Can someone help me find a source for the 16mm pots ("dime-sized") that go into the tight control cavity of my Yamaha? I need 250K log-tapers. Preferably with solid shafts (for set-screw knobs). Also, decent quality. I have in fact checked Warmoth, Allparts, Mouser, and a pocketful of other possibilities and I remain frustrated in my quest. If you can help, Thanks!