I'm missing the cover over the piston on the caliper that presses against the pad. I started to make a disc or try n find a metal piece small enough to fit in there when I realized I'm not 100% sure if it mounts flush or recessed a bit in the circle on top of the cylinder. So, I was curious if anyone has a picture of what it looks like. I'll be by a dealer tomorrow, but I'm just preparing for them to not have the part. Any help on this would be appreciated. My plan was to use thin Lexan, but it may be too thick. Than made a plastic disc, but I questioned it's integrity.