#35 is 3/8" pitch, I believe- 415 is 1/2" pitch.
Go for the 56 tooth mentioned above- it is a standard motorized bike size (have one in a box in my garage). Should be available from several motorized bicycle sellers.
...or you could order a very reasonably priced custome sprocket from here
YouTube - Bike Engine Tuned pipe /sprocket video Take 1