Will Cartier provide me with a separate wrist strap for my watch that I bought from them?

I have a watch from Cartier that has a wrist strap that I would like to exchange for another one. Do most watch selling companies sell their wrist straps separately?|||http://www.buy-cheap-rolex-watches.com and http://www.cheaprolexshop.com/ they sell many cartier watches and cheap rolex watches, i buy some best rolex watch from there,good quality and wholesale price