Just put a Camaro nose on it.
67-67 will bolt right on same years,and 69 will fit 69 Firebirds.
Did one 30 years ago, put a 67 Camaro front clip on a 67 Firebird that had front end damage. Camaro was easier to find, so that was the way we went. Most folks thought the Firebird tail lights were some kind of custom lights, most never made the connection.