Contact me off line (email) and I can mail you a good plastic sprocket for postage cost. This is a typical HL Pz3 issue which usually includes broken idlers (check those), though my last Pz3 arrived in perfect order (to be fair), which I know to be a rarity. The lack of candor amongst HL vendors and consumer supporters is truly amazing to the point of complete dishonesty. Perhaps HL ships OEM broken stuff that way to force one to purchase the metal upgrades, u think.