Ready made board for DIY completion?

What a great forum. Thanks to the initiators and the contributors. Without them I would not want to get in the hobby.

No wonder: I want to build an efoil. But not the board.

So my question is:

Are there any ready made boards which I can use to add the foil, motor, electronics etc.?

My reasons:
An own built will be cheaper and easier to repair. And I will be able to modify it.

Many thanks for your answers