I would guess by the fact that it is not available for sale anywhere, and that Case no longer shows it on their web site, that it has probably been discontinued. They silently discontinued a lot of patterns a few years ago to be able to focus on their more popular ones and cut down on the number of parts/patterns.
That type of knife is utterly dominated by Victorinox, and Case always seemed a bit overpriced to me on that pattern, so I am not surprised that they dropped it from their product line.
You might be able to find some new old stock somewhere with a dealer or on the big auction site if you are diligent in searching, and are willing to pay up a bit.