When my dad first told it the set-up was Quasimodo, who rings the bell with his face, looking for a replacement so he can take a vacation. He finally finds someone who looks exactly like him but they cant ring the bell by running face first into it. The replacement meets a similar fate as the main character in this joke and the Punchline was "His face doesn't ring a bell, but he sure is a dead ringer for Quasimodo"