theres guys with other cars that take apart the truck leds and mount the circuit board and led part inside their taillights http://www.buytruckstuff.com/ledlights.htm At least you don't have to deal with the soldering and all that other stuff
Actually for our application, I believe we'd have to use the 3 arm models, for $35 a bulb. I am considering getting them just to try them out. Not sure what size I need though.
I'm not a big fan of led tailights, they do look good. It mainly just updates the styling so much. Headlights and tailights are usually the first thing to make a car start looking old. This makes it still look current.