Passenger side mirror?

I believe that is still the same style mirror in 75. No vents to deal with, but I added one on my Duster. Looking at sales brochure, duals only offered if 'sport' mirrors. A-body base is diff than E,C etc. So if not offered on older, newer... when were they ever available on a-bodies. I got an older mirror, but cant say 100% if it is factory -but I believe they were available. Can anyone say for sure they have one from factory? Dealer add?2017-06-17 16.15.35.jpg