NOS Sport Mirrors. Box is a Olds box, but should fit the 73-75 Apollo. Also fits Nova, Omega and Ventura. Who knows what else it may fit. Price is $250 plus shipping. Parts are located in NY.
Sounds like (if I am lucky) he wants the date code on the surface of the mirror,Should start with a "4 "(Buick) then a number (month) a "dash"- the last number (year)