West has lots of more or less "standard" tillers, but if you don't want
to go there, and I wouldn't blame you, you can make it yourself.
Lamination is one technique, but I've seen on other boats, and
installed on an Ericson 30 a mattock handle. Now it looks like it's
off the farm, which isn't too far afield, but it works, and it's solid.
A tiller is no mystery

good luck!