SSWEE
You may have a point there. I think it was my 77 or 78 Tornado (last year for the big ones) that I could not buy bearings for the front spindle. Dealers and everyone said it was made as a unit and bearings could not be replaced. I did though
Pressed them out myself, had a friend working at Timken bearing pick me up a new set and I pressed them back in myself. Was a common bearing too I found out after he run the numbers for the Timken bearings.
Maybe that alternator bearing is the same type deal? I know I had one once even the rebuild shop told me it was not replaceable and to get a new alternator, can't remember what car that was though.