I found a universal cable from Napa, I believe it's #6151604, which seemed like it would work. I cut it down and put the end on. So far so good. When I installed it and tested it in the car, the cable immediately broke. Now I've sent the head off for testing or rebuilding. It didn't seem like the head had seized up, as superk226 suggested, since I could turn the end with my fingers so I'm waiting for the diagnosis from the speedo shop. Thanks all, Jim