Heino und Jerry im Über Space kindly brings us Nina Hagen and Don Rickles on Merv Griffin in 1985.
If that doesn't double your fun, there's always the story behind Evelyn Evelyn as told by singer/songwriter/force of nature Amanda F*cking Palmer.
Or perhaps the twin likeness of Philip Ahn/Master Kan from Kung Fu on If Charlie Parker Was A Gunslinger . . .