Anyone on a gluten free diet, know where to purchase gluten free saltine crackers?

I've found that the Schar brand has decent GF products. You can find who sells their products in your area at the site I've posted below.

http://www.schar.com/us/store-locator/zip-search/

They do tend to be very pricey where ever you find them.
Amazon does carry a selection on line.
Hint for a substitute? If possible one can learn to opt for Air Popped popcorn instead of saltines in soups. Cheap and gluten free.