You might try a place like Bob's Speedometer in Michigan. I think they do about anything concerning gauges, speedometers, clocks, and so on. I don't actually know if they do cables, but I'll bet they do. (They are kinda' expensive for gauge restoration, but do an excellent job. ) Years ago I had a local speedometer shop do a cable for my '37 Coupe, and they just simply made the darned thing. I guess somebody, somewhere, can still do that if they have an idea what they are working with. ????? Do you need measurements from mine? Pictures?