With a /5 USA I don't recall if you'd use a "Green" or a "Nurenburg Green" to be correct. Any decent paibnt shop can mix up that color from the Glasurit codes number or easily match from a clear and clean sample of the paint. It doesn't have to be (nor can it be, as it's a metallic paint color) an absolutely perfect match but you can get very, very close. No need to send off overseas or make a big production-- that will end up costing you a lot of $$$ for nothing gained.
'73 R60/5 Toaster
Luddite. Not just a philosophy, a way of life...