I have a 1981 Malibu with the original single outside chrome mirror on the driver's door. I'd like to upgrade to the later Monte "aero" style outside mirrors. I know that the '86 & '87 El Caminos used this style mirror, and that they mount further forward and higher on the side of the door. Does anyone here know if the mirror gasket (black plastic piece that goes between the mirror and the door) is specific to the Malibu/El Camino style door, or is it the same as the gasket for a Monte Carlo door? Also, does anyone know if there is such a thing as a mounting template for these mirrors, in order to position them properly on the doors? Thanks in advance for your help.