Hi everybody, I've been trying to track down some knobs for a restoration, and I can't seem to find any information or suitable replacements. The knobs are black anodized aluminum, and they're 7/8" x 5/8" or 21.75mm x 16mm. They have a single setscrew and are made to fit a 1/4" shaft potentiometer. I think they're from around 1978-79 if that helps. I've found similar knobs that are 3/4" or 1" wide, but never 7/8". Any clues would be greatly appreciated. Thanks!