I bought a mirror for a 65' Mustang an the fits almost perfectly the two of the three screws line up except the third one is off by about 1-2mm. I liked the polished look and the way it seems to point forward. I flipped the mirror and attched it upside down to the mounting arm to bring it up a bit.
I bought the kit pictured here:
65' Mirror Part KIT-MIR-1 $35.00 not cheep but preatty.
Here is the best picture a found on my computer(not a great one)