89er - My - I would drill out the headlight housing with progressively larger drill bits until it looks right to you. Then, either paint the insides silver or line with a piece of tin foil. Glue a small piece of clear scrap plastic in the center to represent a bulb. Then, all you have to do is find a scrap of clear plastic to make the lens. A piece of the clear plastic that covers stuff you buy at the hardware store (smoke alarms) can yield lots of small clear parts.