You can pretty much find it everywhere in my area of SC. I do remember somewhere I used to frequent it was unavailable. I can't remember if it was when I was in college (Clemson---sorry Justin), visiting my college friends at/near Myrtle Beach or when they lived in Columbia afterwards. One of my college buds used to bring it large quantities from one place to the other.
Good stuff. The diet sundrop is virtually the same. When I first started drinking diet soft drinks it tasted good and just like the real deal. Now they all do, but not at first. lol