oldchevytrucks.com sells the original colors in enamel. A Dupont supplier can whip up any old GM paint that you know the correct name for. I have not needed Forester Green but they mixed Juniper Green that is a perfect match when compared to a cleaned off greasy spot on my 1955.1 Chevy firewall. I had the same experience with 1950 GMC Pimpernel Scarlet.