The quilt is from Pottery Barn. There is no pattern to buy, but I agree that buying layer cakes would work, or buying a lot of yardage. You would have to calculate based on dimensions.
Someone is selling that quilt on eBay: ttp://www.ebay.com/itm/Pottery-Barn-Georgia-Patchwork-Quilt-F-Queen-2-std-shams-Red-/150765134292?pt=LH_DefaultDomain_0&hash=item231a4d61d4#ht_1106wt_1299 or Pottery Barn:
http://www.potterybarn.com/products/...d-quilts-shams.