Sweet 16 (please help)?

Okay...me and my friend are having our sweet 16 together....its going to be big and its going to be at a neighborhood clubhouse (most likely)! The theme is graffiti and we are going to turn all of the lights of and its gonna be glow in the dark...does anybody know anyplace in Kentucky or online that I can get a very big picture of me and my friend (in black and white( that we can hang on the wall)...it has to be cheap! and does anybody know some online stores that has items for our party!!!