Using the link in the article, it appears that it's already been taken down (link leads to a 404 page). However, from the comments in the article, it's been mirrored at http://cryptome.org (at the top of the list, in fact, filename is tsa-screening.zip, in case that makes it easier to find it).
Looking at the dates on the document, it was last revised in May 2008, so it seems like the horse left the stable some 18 months ago as far as actual bad guys and spies (who presumably seek out this information more actively than your or I) are concerned.
