I suggest making one out of mahogany.? I have 2 15 year old scouts recently make one and it was an enjoyable process.??
Steps:
- mill the mahogany to 3/4" thickness, you might be be able to find it at a local lumber store, probably not a big box store
- trace the rudder shape onto the mahogany
- cut the shape out with a band saw or jigsaw. band saw is better, keeping outside the line
- Sand the edge to the line
- use a 22.5 x 1 R router bit for the long tapers edges, and a 5/16 R round over bit for the other edges?
- sand, sand, sand.? ?We did it to 320 grit
- drill the three holes for the rudder cheek, spring pin, and tiller
- brush on 2 coats of helmsman varnish on the rudder
- assemble rudder
- sail