I have a snowblower that has a bad bearing inside the auger on the chain side. Took it apart, and now I can't find a bearing like the one I need! One thing I need to know is if these parts are metric or American? If it is American, it is a 3/4" inside diameter, 1 5/8" outside diameter, 7/16" width. Anybody have a place they get them? Near Rochester, MN. It is a model 53321 snowblower I think as the model # plate is really scratched up.