I have a 1990 Four Winns 180. My gas cap broke off. It is a flip-up type gas cap that is held on by a small pin or bolt. One of the eyelets broke and I lost the cap in the water. I looked around at a few boating place and could only find the screw type gas cap. Does anyone know where I can find the flip-up type gas cap that was used by Four Winns?