Saginawparts is the seller’s name on eBay for the these select quality cylinders that have been prechamfered and Nikasealed for heat resistant and low friction. They sell for $99.99 shipped. You will need to purchase new studs for installation or remove old ones from old original cylinder but they do not come out easily. Just buy new studs from Yamaha, they are special black steel studs and yes they are proud of them.