[UberTorpedo]

Just saw this site and thought I'd share the link.
It has a long list of recordings including :

“Radio Moscow”, “Military Radio Transmissions”, “ Großdeutscher Rundfunk”, “French Radio June 1944”, “Charlie & his Orchestra”, “CBS world news today”, “Radio Ostfront”, “Feindpropaganda”, “Kriegsweinacht 1940”, “Ambient frontline Sound”, “Occupied Holland, 1943”, and lots more. They're not free (but not expensive either).

http://www.joeri.net/radiofiles/

cheers