I am not as astute as this board, but this auction shows GNX #344 for sale:
http://www.ebay.com/itm/Buick-Grand...ad12027ab&item=321336125355&pt=US_Cars_Trucks
http://www.ebay.com/itm/Buick-Grand...ad12027ab&item=321336125355&pt=US_Cars_Trucks