I've seen these dirt cheap for a new board (<$1k). Be aware that they seem to be thinly constructed and may not weather the abuses from windfoiling well.
https://www.seabreeze.com.au/forums/Windsurfing/Foiling/Is-this-a-construction-issue-
I have the same board. Looks like a single layer of cloth and a brown filler layer that is thicker than the cloth layer. I'm on repair number 5. I've used it 5 times.
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