My lenses used to melt till I went with the small round bulbs for the license light. If you put the bigger bulb in it, that was long and oval like the dome light type, but with a single contact, it got too hot and melted the lens. Never used a tinted, just the clear glass type.
I also found some small 4-LED lights for the side markers. Can't remember where I got them though. I bought them to use inside a pencil type shift light.
Try ebay.