Elvis Is Alive! I Swear I Saw Him Eating Ding Dongs Outside the Piggly Wiggly's (1998)

A down on his luck filmmaker is hired to do a film about people who swear they've seen Elvis Presley, even though he's been dead since 1977. He travails across the U.S. interviewing an eclectic group of people, searching for the 'truth'