It was called Pacific Motors . Their email is info@pacific -motors.com Someone forwarded me a good site for used parts and this was one of the ones that listed a used light for sale. There are others as well. I bought from these guys because they said it was "Tested". They called me I asked them to retest it because it had been sitting on a parts shelf for several years. They did, sent it to me and all is good. Total cost was $60. On another thread someone said they found a new one from Chrysler for $175. I would have bought a new one but could find one. I'll check the other thread, get the link to the parts supplier listing and update this response shortly.

UPDATED: Here's the link to the used parts website. You can search by area / etc. http://car-part.com/ BTW, on the parts list, select "Third Brake Light" A long list will appear. Also, select years 2004 -2008. You'll need to make sure you look for a coupe or roadster depending on what car you have.