GM tells me my 1948 1 ton was paint code 830 - Commercial Blue for which the Dulux paint code is DU-245. Unfortunately my usual paint supplier can't find a mathch anywhere. Does anyone have other manufacturer's codes for this paint? My firewall still has the blue; it's a medium blue, not too light and definitely not a navy blue. Could it be a north of 60 version of "Mariner Blue?Deep blue sky comes to mind. By the way, original cab interior is grey.