Any electronics can be converted to 220v. 1) Use a step-down transformer. 2) Get a replacement transformer that has a 220v primary, but with the secondary(s) the identical output voltage. Also, the fusing needs to be halved.
#2 above is harder to do - obviously someone who knows how to work on electronics is required. #1 would be your best bet if you can't do #2.
#2 above is harder to do - obviously someone who knows how to work on electronics is required. #1 would be your best bet if you can't do #2.