Peter Brosnan started searching for the Hollywood holy grail, created for the 1923 epic and then buried among the Guadalupe-Nipomo Dunes on California's Central Coast, 10 years ago and was thrilled when he unveiled statues created for DeMille after a day-long dig.
But he couldn't raise the funds to excavate the set and movie bosses were far from interested in funding a dig as part of a documentary.
Brosnan temporarily abandoned the idea, but now the New York University film school graduate is hoping a grant to make a film about the area's links to Hollywood's great early films and stars will help him start the excavation.
Brosnan tells the Los Angeles Times newspaper, "I didn't realise when I started this project that it was going to become an epic of it's own."
The publication reports DeMille's 'lost city' was bulldozed into a trench and covered with sand when filming wrapped - because the legendary moviemaker feared rivals would steal his statues and it was too expensive to haul away and store.