Contact S&H Chrome Plating in Tennessee for a quote. They do an excellent job and I found them to be reasonably priced (all things considered) when they straightened and re-chromed the severely crunched rear bumper of my '66 Toronado.
With bumpers, they have fixed prices regardless of how much work your bumper needs. Not sure how they price multi-piece grills.
615-865-0100
1950 Chevrolet 3100 (Ol' Roy)
1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)