Passenger-side (right-side) mirrors were not really common on cars in America until well after the A-bodies went out of production. There was a factory-optional RH mirror that looked just like the optional LH remote-control mirror, except the RH mirror was not remotely-controlled (roll down the window and push the glass). And the various basic manual-adjust sideview mirrors offered as accessories could be mounted on either side of the car (roll down the window, grasp the mirror head and move it around).
A right-side mirror with flat glass, which is the only kind that was offered, is basically useless. The field of view is much too small. That's why all modern cars have convex glass in the passenger-side mirror (OBJECTS IN MIRROR ARE CLOSER THAN THEY APPEAR). On the other hand, those stick-on domed "blind spot mirrors" take things too far the other direction: big field of view, but everything's tiny and distorted.
There are mirror specialty places sprinkled around the world that could probably cut you a round piece of mirror glass that's convex, but just slightly convex (like current-day factory passenger side mirrors) not super-duper convex like the peel-and-stick ones.
It's a big damn shame
this American invention never got commercialized. A couple discs of that kind of mirror glass would go great in the mirrors on either/both side(s) of an old car.
