My Schwinn 1500 pump stopped working yesterday. I looked around for a replacement diaphragm, because the edge looked a liitle frayed and mangled. I couldn't find one, so I bought a new pump. But after taking a closer look at the 1500's diaphragm, I realized it was just a circular piece of leather that gets kind of cupped up in the tube. Soooo, I'd like try to make a new one, but I don't want to cut up my suede jacket for material Anyone know where I can find a small piece of scrap leather?