I'm interested that you used 9 speed on these. I have 2 silver and 1 black set of Shamals, and only the black can take 9/10 speed. If yours took 9/10 speed, it must be possible to get a cassette hub to fit, although everyone I have consulted told me this is not possible.
If your Shamals have a 8sp freehub, you can get a convertor from Corima to turn them into 9/10sp, for either Campag or Shimano frehubs. If it's a screw-on you're fucked.
If your Shamals have a 8sp freehub, you can get a convertor from Corima to turn them into 9/10sp, for either Campag or Shimano frehubs. If it's a screw-on you're fucked.