Injecting two part epoxy (WEST is my favorite) into any cracks, clamping and curing, then doing the threaded rod makes a Sunfish rudder, even after damage, nearly bulletproof!!? Then sand and coat with your choice of finish.? No reason to make a new one, no reason to buy a new one, unless you're not the greatest with tools, but nearly anyone can do these projects.?
turluck