I'm using a silicone baking pan to raise the headlight off the metal grill. I've melted a light before, but it wasn't a big deal since it was on the bottom. It's really easy, and that's where you'll save the money if your going to do a retrofit.
Amazon.com: Pyramid Pan Silicone Cooking Mat (Large): Kitchen & Dining
Amazon.com: Pyramid Pan Silicone Cooking Mat (Large): Kitchen & Dining