There's a fairly cheap way to do it yourself. Use a red "stained glass" paint that you should be able to pick up at any art supply store. Remove your tailights and first wash them and if you want use a very light wet/dry sandpaper. Then spray two to three coats of the red stained glass paint on the outside of your lights and then a couple coats of clear. And that's all it takes. I painted mine over three years ago (for around the cost of $10) and they still look great. Here's a couple of pictures.
http://www.autotrader.com/findacar/i..._record=1#main