This site has thousands of quilting patterns:
http://stores.digitechpatterns.com/StoreFront.bok. There are wholecloth patterns. Triangle patterns can be repeated to form a whole cloth.
Here's a couple of books for wholecloth:
Quilting for Show: a practical guide to successful competition quilting by Karen McTavish, published 2007 by On-Word Bound Books, includes DVD
Wholecloth Linen Quilts: Patterns and Designs by Cindy Needham, published 2007 by American Quilter's Society