Does anyone have the part number for the selector/master knob? I was given a number which turned out to be the wrong part, can anyone help?
I see those 3D printed on eBay all the time. IMHO they are usually a rip off at 10$+ for a low quality filament print. If you can find a 3D model or have someone draw it for you, you can find a good 3D printing house that will deliver something with a much better quality for less money.