Mark
Only just picked up on your Wanted Ad - but if you are still looking then I have a Silent Gold SMG99 36V motor that I acquired with a TTIAX 1m dish from a local recycling site a few years ago but won't be using it as I have now installed the dish with a USALS motor.
I don't know if the motor does work because I have never tried it out, but I suspect that it does because the complete dish/LNB/motor assembly had been disposed of by someone - and the dish itself was/is in VGC.
As I can't vouch for the 36V motor, I would propose that, if collected from my home (Hayes, W.London) you can take it away and try it out - then if it works, a £15 payment by BT or Paypal Gift but if it does not work then nothing to pay!
PS: to other readers - if Mark does not want the motor now, then the same terms would apply to anyone else who wants it, although Mark has first pick if he does want it!
John