broken bearing retainer

You might also need to know the size of the bearing behind the retainer. There are two sizes of bearing & three sizes of retainer. I think there are two sizes of retainer that will fit the larger size bearing but not sure about how many that fit the small size bearing. IIRC, the larger bearing will have the number "308" stamped on it. Don't remember for sure but I think the smaller bearing is a 307.