Traditionally a sutler was a civilian who sold provisions to an army in the field, in camp or in quarters. These merchants often followed the armies of the American Revolution to try and sell their merchandise to the men.
These days the name sutler is used to describe businesses that provide period uniforms and supplies for reenactments, television shows and movies. They are especially associated with the American Civil War. If you need to find a sutler, then they will often themselves play parts in historical reenactments and sell there products there. You can of course also find them in there modern stores and on the internet. One such supplier of American Civil War clothes and supplies is Fall Creek Suttlery of Indiana, they can be found on the internet site of www.fcsutler.com. There site has a simple layout and contains directions to there store as well as the chance to view and buy some of there products online. 
