I saw an older thread of Pats of some they were making but if I remember correctly they were specifically for the split sprockets they make, different from the go kart sprockets. Correct me if I'm wrong.
I don't think strength would be much of a concern when you think about the motors they run on go karts with these sprocketsI do like the idea of easy gear swapping, but I'm concerned with strength. Im sure if Pat sells one though, it's good quality, and expensive. Very expensive.