Those of you with a Costco can usually find it there, in BIG rolls! I have a DH, DS, and 3DDs that all hunt, so we are always processing meat and making sausage in the fall. I bought a box at the grocery store 4 years ago, put QUILTING ONLY on it, thinking it would be safe.....they ran out on the big roll and did not hesitate to ransack the sewing room for my stash.... the new small box is hidden better!!!
It is hard to find in your local grocery stores, but they usually have it. You can also ask the store manager to order it for you. Many here will do special orders, and it may still be cheaper than a quilt shop.