Hey! I just wanted to post about an awesome site that I discovered. It is called FreeVintagePosters.com. It is a neat site were you can download and print all the vintage posters you want.
They have categories like Animals, Food & Drink, and War (which includes a lot of WWII posters).
Anyway, I think that it is an awesome site and I personally wish that I could print almost all of them but I will let you be the judge.
Note: I did have a little trouble trying to get them to open but they are just fun to look at too!