Sprocket for Ysr

I am looking for a larger sprocket that will bolt up to my Ysr 50's Rear hub. It doesn't need to be wider in diameter but wider in chain thickness. The size on the YSR's Chain says 470 and the new chain that will be used says 477 on it. There are no other markings. If I cant get one that will fit by bolting it up I will machine an adapter plate. The 4 holes on the larger sprocket are more spaced than the smaller YSR's Sprocket.

This will be used for my Lifan 150cc conversion. Please let me know if you know of anything or have any leads about where I can track one down. thanks.

Never mind Team Calimari had everything I was looking for. I should have called them before posting