I think the best front end of a commodore for Aero would have to be the VX Commodore S or SS.
If you blocked its very small front grill between the headlights.... it only leaves a small radiator opening and the rest of the bumper sweeps gently to promote the air to go around the shape of the car.
Shame the VX has a rounded rear boot. Would be perfect if it had the VY/VZ rear end.
