Where can i buy a real nuka cola?

i wanna buy one, but my mom cant order online (im not 18, i live with my mom) also, without going to e3... although that would be nice :/ i know theyve been promotional items, but... getting even just the bottle would be SWEEET! XD i dont have the right material paper to make my own labels (ya kno, theyre like plastic paper XD)... or a printer :/