http://essentialbaking.com/. The price at COSTCO for a double pack is around $9.
The essential baking company has a whole line of GF breads on their site. It is worth looking at. You can order directly from the site.
Here is the ingredient list: Filtered water, mixed seeds (sunflower and flax seeds), rice flour (white, brown and sweet rice), egg white, hi oleic safflower oil, tapioca flour, sugar cane fiber, granulated sugar, yeast, pear juice concentrate, plum puree (prune juice concentrate, dried plums), modified cellulose, salt, xanthan gum, baking powder (glucono delta lactone and calcium carbonate), cellulose gum, orange citrus fiber.
*Contains Egg Whites