I've looked into making some myself. It really wouldn't be difficult if you have ever done any plastic work and are good at making molds. I would probably use a clear polyurethane for the actual housing. The led boards are relitavely simple, but there is another plastic piece that they sit in, and potting compound around them. Not difficult, but just another plastic part to mold/make. The reflective part on the inside just looks like a piece of polished aluminum to me.
The problem is that just getting everything set up to do it and getting the materials is about $400-$500 if you don't have it already. And that doesn't include the led's or plugs or wiring. I might do it someday, but that is a lot of money for some fancy tail-lights.
Last edited by b.miller123; 02-25-2012 at 09:47 AM.