That's good news Tom about the number 12 in your decal stash.
Boy you are 100 percent correct about Hasegawa and the white colors in the decal sets they provided in their kits. However I recently purchased two 1/48 scale F6F Hellcats, ("10,000th Hellcat", & "Pacific Aces" ) where they must have been a more current release. The white actually looked white instead of the usual cream color one normally associated with Hasegawa kits from years ago. It was a pleasant surprise...
Hopefully you can build a P-38 for the GB. That would be very cool...
Looking forwards to progress of your Augsburg Eagle...