There isn't a cargo conversion available for the 777-200 or 777-200ER. But at the right price they could probably find some buyers in the VIP and charter markets.
American football teams and the military regularly charter that size aircraft to move personnel. The Arizona Cardinals own five 777s. The New England Patriots own two 767s. In addition to flying cargo, Atlas Air does passenger charter with a fleet of ten 747s and 767s.
