I have an 86 chevy pickup that I want to change the mirrors on. The originals are so ugly. I found some nice mirrors in the wrecking yard, from a mid 80s GM car, they even have adjusters from the inside of the vehicle that perfectly match the electric window controls. The problem is that the side of the pickup is close to straight up and down, and the car mirrors are on more of an angle. They are made of plastic, and I was wondering if there is a product that I can use to build up the bottom side of the the mirrror where it attaches to the side of the vehicle? Any suggestions?