What about the cheap instant coffee you get in a tin? The one Nestle makes contains large % of Chicory. I know it makes me feel better than stale filter coffee.
I use instant double espresso when I don;t have access to fresh beans. Ray has mentioned that it is still good as long as it doesn't contain fillers. I would personally look for instant coffee instead of the one that cuts it with chicory, but if this is your only option, it's better than stale coffee.