That seal is an Isuzu seal. You will not probably not find a cross reference for it. I.e. Parts stores will not have this part.

Just so we are all clear, to remove the entire axle, it comes off with the bracket attached to it. The seal and bearing are retained with two c-clips. You cannot remove those clips without pulling everything out. If you pull on the axle, you will destroy that seal. As, I think you have discovered.

Michael