I got a vintage camper I am redoing to tow behind my Galaxie and went to clean and replacing wheel bearings and the grease seal are shot. Cant cross them anywhere. Has Ford emblem stamped in them and NMB. nothing else. Anyone help on these. Outer wheel bearings crossed to 1954 Ford and hubs have the center part of the drum still on them. Spent an hour and a half at parts store and called the Ford dealer with no luck.