I have put studs from 12-bolts in my 8-bolts. They just need a flat side ground on the head to fit - if that makes finding some easier. The best source is somebody scrapping out wheels. Buying all new hardware will cost more than the wheels. I think it's good to have extra studs and nuts, too. I lost probably 4 or 5 in the first year of having H1 wheels. Since then none have broken, but I still carry some.