Please reference the parts diagram below. I will use terms that are on that diagram, so as not to cause any interpretation issues. You only need the hub (Group 42421, P/N 42421-20020), not the bearing or the rear axle shaft sub-assy? Or do you need the entire rear axle hub & bearing assembly?
If you need the entire assembly, I would suggest you pull one off a salvage car. If you go that route, make sure your turn the shaft by hand slowly, feeling and listening for any sound or harshness or roughness while turning it. Also try wiggling the shaft relative to the hub. If nice and tight, and it turns smoothly, it likely would make a good replacement. Except for bearings and seals, I don't think Toyota or the aftermarket has complete rear axle hub & bearing assemblies for this vintage of Celica anymore.
