linicx, even to those near enough to big urban centers, there is always something not available. As I travel across country (different areas during the summer) I often try regional products. I always keep the store reciepts so I can look them up again if I liked the items. I buy certain corn meal from South Carolina and certain whole grain flour mixtures from Kansas...neither available where I live in PA. SOmetimes I find a web site for the company, sometimes just a phone number. (one small company didn't take credit cards..."just put a check in the mail to us and we'll send you your order by return.")
Sometimes the hunt is part of the excitement. Sometimes I drive somewhere going a certain way so I can stop at that store again and get more of that "whatever". Often a TV show has a list of ingeadients and suppliers, so if you are watching FoodNetwork check out their website for where to get it. And also check for possible substitutions.
Good luck.