Where can i find crepe paper?

This is kind of a strange question but i need help soo, for my fashion cl we are making dresses out of paper. Each of us are, and my teacher encouraged us to use different types. Im going to use crepe paper because it has a bit of give and stretch. So my question is, where can i find larger pieces of crepe paper? i'd prefer not to have to use streamers, im hoping to find larger pieces to work with. So any store suggestions, even something generic like a art supply store would be greatly appreciated! Thanks!