Joseph's Low Carb pita bread is pretty darn good. It's a whole wheat pita with soy and oat flour. It's soft and fairly tasty with (I think, I don't have the bag in front of me) 5 net carbs per pita. It's a little softer than regular pita and a bit blander, but it's one of the better low carb products I've found.
I don't know how widely it's distributed. I found it in my local Stop and Shop.