Jmt455: I do believe MikeT1961 is correct; as my driver- side mirror is remote and with solid non- swivel rectangular chrome. Thank you for the suggestion, but my hunt will continue for the correct passenger- side mirror.
When I got my 78 Buick Electra Limited, it did not have a right side mirror, and I got the manual, non-remote, mirror that matched the remote mirror on the driver's door. I had my choice of both the non-remote and the remote control version. I believe that all the B- and C-body cars except Cadillac used the same mirrors.