Hi, I have a Western Flyer coaster brake hub which I believe was made by Musselman. It is not the skiptooth style. Strong brake but made moaning noise. When I opened it up I found the smallest bearing ring completely disintegrated. This is the outer one on the outside of the sprocket. I counted seven loose balls but can't be sure that's all there were. Does anyone know what bearing I need to replace the bad one and maybe a lead where to find it? Thanks!