Angel,
The Rotax starter is identical to the Leopard starter. There are plenty of them around. I always carried an extra when we ran Leopards. Most of the time when a Leopard starter stops working it is because one of the brushes broke from vibration. You can buy a brush kit and easily rebuild the starter if that is the problem.
Anybody out there have a used, rebuilt Rotax or Leopard starter for Angel?