I'd like to find a small used or new canvas type of bag with fold over flap and shoulder sling for quick access when out street shooting. Contents will either be a M3 and 50 or any AF with single short lens. The smaller the better and I'd prefer no zipper. I've yet to hit an Army/Navy store, but their products might be along the lines of what I need. Any ideas for something that doesn't scream photographer and is small?