We may be opening a can of worms here.
If you have a single speed pump, you have the Wavemaster 7000, which comes with the convertable version.
If you have a 2 speed pump you have the 9200 already, which comes with the straight 220v version.
If you have the water feature, you have the 220v version.
The 7000 is a 110v pump and the 9200 runs on 220. In addition to changing pumps, you would have to upgrade your wiring coming into the spa. Don't know what else you would have to do. Even if doable, I don't think it is practical.