I agree, the rivet was probably filled over, or a patch was welded in that area to repair. As for the Rosette rivets and price, they are getting hard to find due to the issue of stolen cars with swapped Vins. I think that due to the liability, they are just not easily accesible. Last year I saw a guy who had a set and his sold for $35 for the pair. As said, for anyone that has to do a upper cowl replacement or repair, it may seem like a small price to pay to be correct looking.