The poor ol' stock P-39 has such a drab texture that, while I was doing an errand for a friend, I decided to spruce-up the Aircobra a bit.  There are two skins now available for download in the New CFS2 Downloads section, page 11:
http://www.simviation.com/simviation/?ID=301&page=1000

Whether you fly her or just use her as an AI, she can use the make-over.  One adds star insignia to to wings (top & bottom a la mode), a tail number, a nose letter and the 8/11 Cobra insignia.  The other is the same less the Cobra insignia.

They're just quickies, but turned-out OK.