Here is another inexpensive solution: the musette bag. They have been used by our military since at least the 1930's that I know of. They can be found at military shows or flea markets. They range from brown, to tan, to olive. Some have a shoulder strap, and some just have straps with snap clips and you have to find a strap for it. You can see the strap and the snap clips in the picture. Personally, I think women stole the idea of purses from soldiers with musette bags.