There's supposed to be some new shelf-stable "complete meal" products due out soon from Old El Paso. They don't sound too bad! I've heard that some Walmart Superstores are already carrying them, which is strange because the linked news report below says they're due out at the end of March.
I saw some at a Walgreen's (drug store that is like a mini super market) and picked up two of them for about $3.50 each. They list each bag at 5 servings at 80 calories a piece. I guess you could get 5 tortilla's out of each bag. I put one of them in the microwave for 1 minute and ate it out of the bag as is. It was very good! They have a couple of different flavors with chicken and beef. Worth keeping a few around for easy meals or to compliment other meals. They are also selling them at Publix for about $3.50 as well.