Door replacement 2006 cobalt

What is your question?

Hello, I have a 2006 silver chevy cobalt LT. The door has been dented and I was considering going to the junkyard to find a replacement door as my dealer quoted me $1500 for repair. My questions are 1. Did the colour code change in the cobalts between years 2. Are the doors in the Cobalt and Pontiac G5 interchangable? 3. Is it possible to hook up the electrical to work with the Cobalt LT if I purchase an LS door? Thanks so much for your help!