Trying to find the right wheel bearing

The outer race is a press fit into the hub. If it just pushes in and/or spins in the hub, the hub is bad. The inner race is part of the cone assembly and is just a push fit on the spindle. There shouldn't be any slop on that fit, and any bluing or galling on the spindle and that should be replaced. The drum has nothing to do with the bearings. It's just attached to the hub with studs (which should be staked IMO).