Probably not teak
I don't think teak is really strong enough for a tiller on a C-22. Teak might be used on smaller boats, but I doubt it. You may think that your teak deck hand rails are strong, but they are secured about every foot or so. Were you to remove those deck rails, I am sure you could easily break it in half. Hence, teak is not used on tillers. As mentioned, West Marine and Boat US carry tillers for C-22's.Also, Catalina Direct which sells two versions, one being more robust than the other and, natch, more expensive.Also, you may wish to invest in a tiller cover to protect your new tiller from the ravages of sun and weather.