Dremel 4000 speed control fixing

I bought a dremel 4000 that fits 120V and 60Htz, while in my country we are using 220V and 50Htz.
Once I received it I was excited and connected it to the 220V, so I corrupted it.

My questions are:
1. Can I replace the speed control with one that works with 220v and 50Htz without affecting the other parts?
2. What is the part number of teh speed control that fits 220v and 50Htz?

Many thanks for your help...

BR,
Taha Massalha