S.A.
I think our church buys them from Sam's, if you have a membership, or a friend does. They look like the kind you would see at a nice restaurant, plain white linen. Then you could put a fabric topper that goes with your theme. If you want to go fancier, then I would also suggest Macy's or Dillard's, TJ Maxx, or Marshall's, for a discounted price.