A lot of those German Radios from the 50s and early 60s had Knobs similar to the Knobs I am looking for. Radio Makers such as AEG; Telefunken; Saba; the list goes on. A set from such radios could suffice my need, even if they require a little modification. My outside Shafts, the smaller two of the four, are of small diameter, a little over 1/8 inch diameter, and use set screws to secure them. Any help would be appreciated.