[Lee Reed]

I'm going to guess you want to do 360 + rotation & don't want to fasten the chain to it but want to keep on revolving. That being said, if I was faced with your problem I would apply a wire wheel to the teeth at frequent intervals to "eat away" the excess tooth width. Don't agonize about the tooth geometry it doesn't have to be perfect it just has to work.
Good luck. Regards.