Golden Thread makes a product called "Preview Paper." It's a roll of plastic with a black line printed on the long edge, that's just for that purpose. The price on it was $10. It is recommended that you put a strip of painter's tape along one short end, and write, "Draw on this side only," so the residue from the dry erase marker won't get on your quilt.
Having said that, the vinyl might be a less expensive way to go, and may be a little thicker. JoAnn's usually has a great selection of clear vinyl.