A little googling - http://www.amsky.com/~cafairgroup1/wwii_flying_museum/museum.htm
That one above says it's a museum, but I didn't look through it. At first glance, it wasn't what I recalled.
Here's some more.
Google results
http://www.google.com/search?hl=en&ie=UTF-8&q=wwII+planes+artwork&btnG=Google+Search
The one you mentioned is likely the one I had bookmarked once.