Every July, Pocket Full of Stitches (4523 50th Street) puts all canvases on sale! Special order canvases will be 20% off and in-stock canvases will be 30% off during the entire month of July. This does exclude club canvases. Each day their blog shows another section of their huge inventory. The shop is happy to hold your canvases until the end of the month so they can be shipped together.
See all the fun on their blog: http://www.pocketfullofstitches.blogspot.com