A little correction to my post above.
It's "Trident Sports"that's the North American Distributor for Starboard.
Here's a link:
I have no idea what the Gemini will cost, and that's something you will need to work out with your local dealer.
I guess that would e somewhere in Wisconsin (Isthmus Sailboards or
There was a local dealer in the Cedar Rapids area, but I don't think he's doing windsurfing any more.
Hope this helps,