Boat parts are not like car after market parts like a fender or door or hood.
They did not make enough of them for anyone to go into after market pieces like that.
You could remove the lamination on the one you have and replace with plywood or marine composite.
Or you could make a new one out of either marine grade ½ inch plywood or with marine composite material plus fiberglass clough and epoxy resin I made mine out of plywood.
If I had to do it all over again I would use composite material mine weighed a ton.
FellowShip
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Just for the Grins
Official 23’ SF Antique Classic SeaCraft Owner