Hi John, it appears that the hand measurements are 1.30/0.84/0.21 mm, that is, 1.30 mm the hole in the hour hand, 0.84 mm the hole in the minute hand and 0.21 mm for the seconds hand. You will only need to measure the minute track for acceptable length or the actual length of the original hands and browse different vendors. I sometimes find stuff unobtainable at ofrei in cousins or sometimes borel, cas-ker and esslinger...those are my main sources. Maybe we can get more input from other members...
Another solution you can try is finding the closest hole match and either broaching it larger or crimping it smaller but that is a difficult and very skilled endeavor. Hope this help,
Cheers,
Bob
PS. You can actually measure the post where the hands go. i.e. cannon pinion, and so on, with a gauge...I find this kind of difficult in some movements without disassembly.