Take a sample of the color that you need. The one near me only had a lighter gray, even though they said that it was the dark gray. They also said they weren't going to order any more until what they had was gone, so I was pretty much SOL, there. (I guess guys needing headliner fabric are not an important part of their customer base. Go figure.)
Ended up going to Hobby Lobby. Theirs seemed a bit thinner than I had remembered, but it worked and looks just fine. (Lack of skill on my part notwithstanding. First non-sunroof Fiero headliner that I had ever done.)