If you have a Micheal's Hobby Store, a Hobby Lobby or a similar hobby store nearby, look for the model section. In or near the model section look or the Crayola section and the like. Around these areas, some of these stores carry products they call "Toobs". In essence they're plastic tubes full of an assortment of whatever the tube is labelled as. They've got Wild West, forest animals, Egyptian pieces, etc. The attached is what was in my "Toob" (write your own dirty joke here).
I found these cases while in the hobby store too.
Here's a case with something in it.