Scamp used an odd rivet size on the
windows and around the door and a few other places on the early Scamps. It was between the 1/8" and 3/16" rivets used on the later Scamps. I want to say it was 9/64", and at one time you could get them from
Scamp. I found some 5/32" rivets that had to be trimmed in length to work. The 1/8" rivets are too loose to seal to use. If I had enough
fiberglass, I have redrilled to 3/16" rivets. I would try Scamp to see if they still have the correct sized rivets.
Eddie