I think this fatwa will help you and I will quote this paragraph for you :
Whatever it is haraam for a Muslim to use, it is also haraam for him to sell it to either Muslims or kaafirs, because the kaafirs are also addressed by the rulings of sharee’ah, including rulings on minor issues, according to the view of the majority of scholars, and what is forbidden for Muslims is also forbidden for them. So it is not permissible to sell them alcohol or pork, or anything else which is proven to be forbidden in our religion, even if we assume that it is permitted to them in their religion, because the sharee’ah of Islam abrogates and corrects the laws that came before it.
The full fatwa : http://islamqa.info/en/ref/14355
I will remember you that every fatwa is specialized in certain cases in certain conditions and varies from person to another , so it is better to ask scholar(using the same link maybe) a specific question not in examples to be the fatwa more accurate .