If you ever have a chance to visit a harp conference or harp store that carries Camacs, get some of the long handled tuning keys and try them on the Camac harps. Tuning keys are notorious for loose fit; chances are you will find one that will fit the slightly large Camac tuning pins. That’s what I did.
You could even contact someplace like Virginia Harp Center or Atlanta Harp Center (they carry many brands of harp) and ask them to try some for you. If one fits, they can send it to you.