In regards to the battery doors, I live in Canada and was hoping that I could get my hands on a different color for my wife's phone. As it turns out, (after speaking to both Motorola in Canada and in the US) they only carry the other colors in the UK, and they won't ship overseas.
However I did see a couple of colors on Ebay that would be worth checking out. I will likely order the orange one for my wife for a Christmas present. Good luck.