I like the idea that John V6 posted. Since my car didn't come with the side screens or a top, I assume the top needs to be made 1st and then figure out the side screens. I also have a contact that has a year newer model of my car and may see if I can use his for a pattern. The clear screens is an interesting alternative.
The dealerships may have screens for the newer cars, but those from the 50's, probably not.
