CanvasPeople.com is offering a free 8 x 10 photo canvas (just pay shipping)
Remember 2 Canvas are always better than 1 and with $35 off + free shipping on larger sizes, you can get the size you want even cheaper!
Here is the last photo we got from them. We paid a little extra to have them frame it.
Each canvas is mounted with a wooden backing. So all together it is about a half to three quarter inches thick.