i never really took off my tail lights to check, but I know my friend did his own clear outs int he back of his M3 by taking out the color in the lense. THe lense it's self is clear with color plastic type foil behind it. He removed the colored part and viola clear lights.
This may be able to be done with our car, I'm not to sure but I stil have yet to see any company mass produce for our car. It's probably just a custom job.