We just threw together some costumes last minute ourselves (see this post). We were supposed to be pirates, but looked more like gypsies, but regardless of what we called ourselves, we *did* dress up, and using stuff out of our own closets. Baggy, high cut pants, eclectic shirts, tons of jewelry, bandanas (or in our case, sarongs) tied on our heads. Pretty easy, really.

Good luck.

(Also, this is my I-am-frightened-'cause-it's-Halloween icon, in case you were wondering.)