If you live on either coast, or even in the Midwest in a major metropolitan area, you'll have no problem finding an Asian grocery store. Korean-specific markets are a little harder to find, and if you're somewhere where there isn't a huge population of Korean people, well, you might find yourself at a loss when a craving for kimchee strikes. You can make it yourself, or you can click over to koaMart, an online Korean food grocer.
Sure, they do the dry, non-perishable goods like ramen and rice, but they can send perishable goods like tofu and kimchee as well. I've never shopped at the store since I live in Los Angeles, but if I were in say, the mountains of Colorado (or really, really lazy) I might give them a try. Shipping isn't cheap, but hey, when you need your pickled, fermented cabbage, you gotta do what you gotta do.
