I have a Quaife QDF1U chain drive differential. It is basically a Civic based differential designed have a sprocket bolted to it instead of a ring gear. The holes for attaching the sprocket are left hand thread 10mm and I can't seem to find them anywhere. Does anyone know if there is a factory Honda differential that uses these bolts? Or anywhere I might be able locate some? Any information would be helpful. Thanks.

You take a look at the differential here or here.