I've seen them at JC Whitney. I bought the 3 LED strip (2" - white) and affixed it to the inside of license plate light bezel. The pure white light contrasts nicely with the red tail lights and illuminates the plate perfectly. Anyway, they have multiple sizes and colors, they are waterproof, and somewhat flexible. They are surface mounted LED's in a rubber strip with an adhesive backing.
One additional comment. If you are going to install lights above each headlight make sure the lights are at the edge of the LED strip instead of along the wider portion. They carry both items at Advance Auto.