I think it is just out of stock... here is is directly from color of Eagles, be warned shipping is about $10 so you might want to stock up on other colors you need as well, to offset the shipping costs:
http://www.aircraftcolors.com/us.html
Squadron lists it as out of stock and greatmodels doesn't even list it which means it is probably out of stock...
if all else fails Color of Eagles paint is made by Vallejo, you can oder it here in the VallejoModel Air line:
www.coloradominiatures.com
it is paint color #43, I have a cross reference chart if you ever need to order Vallejo equiv's to Color of Eagles:
http://www.geocities.com/tho9900@verizon.net/Vallejo_Paint_Inventory.htm
Darson here put it together, I am only hosting it...
Good luck!!!