That is a good-looking shape. Dinghy centerboards are not overly complex. The fit is important. Validate the proper thickness using the boat trunk.
From sailboatdata, we find that the centerboard sticks out 3ft below the hull
Max Draft: | 3.50 ft / 1.07 m |
Min Draft: | 0.50 ft / 0.15 m |
You would need to measure the distance from the hull bottom to the pivot point in the centerboard trunk. Then add a couple of inches to that to finish the top of the board.
My 15ft boat had the centerboard and rudder constructed of wood.
You could check with Foss Foam Products of Florida. They build rudders for sailboats and, if you can develop the specifications, could possibly build a centerboard.
It would be worth a call.
About The Foss Company in Newport, California
www.boatrudder.com