The A-7G was a proposed Corsair II version offered to Switzerland in 1972.
It was never built
United States Navy Aircraft Since 1911, GordonSwanborough and Peter M. Bowers, Naval Institute Press, 1990.
Corsair--Sterling Ending To a Glorious Naval Career, Stephane Nocolaou, Air Fan International, Vol 1, No. 6, September 1996.