Try a real parts store. Autozone, Advance, Pepboys, etc are geared toward the consumer, which means low prices and cheap wages for the workers there. Go to Carquest, NAPA, etc (jobber based stores). They cater to shops and therefore service is emphasized over price. (In other words, they know what they are doing).

You should be able to get a hardware kit, or else they should be able to look up a list of all hardware the vehicle.