Here’s the interior dome light I made for my 1/12 scale 57 Chevy model car. The lens is made from a slice of a lucite rod, shaped and polished. The fixture is a thin strip of styrene wrapped and glued to the edge of the lens. A styrene disk with a hollowed out area for the LED is glued to the back. The ring and back are covered with metal foil tape.
After carefully trimming the windshield, I dropped it and cracked it in half. So, I either had to buy another expensive kit for a new windshield, or make one. Using the original as a template, I cut out a piece of thin clear plastic, heated and curved the corners using a hairdryer. Not a bad replacement.