I have a non-lighted vanity mirror stuck to the passager visor.  I cannot find anywhere, where this is original to the car, please help.  Part has a date of 1978 on the back side and the number 45839?

I've got 4 of em. Original equipment.

Thanks, it look like it was.  trim is just like the back of the rear view mirror.  Now I have to glue it back on, looks like they used weather strip glue, black.