Hellow there, the older switch is diferent, it works by pushing it down to activate it, rahter than pivoting like the newer style, I thing the easy solution is to massure the old style switch and bore the center consol to make it fit, the console is easy to remove, and its all plastic, or wood, so shouldent be hard to bore the hole. The switch stays in place by pressure

You need to take apart the mirror to check the mechanism, depending what you encounter it may or not be reparable. the process is easy and dosent take much time