The making of map packs was abandoned long ago, when it became clear that the production of new maps was happening so rapidly that any packs being released were already incomplete or had older versions of maps that had since been updated.
The easiest way to get a copy of every map is to get a copy of the Windows program FlashGet* and go to
http://sad.dhs.org/files/maps/ in IE. Then right-click in the window and select "Download by FlashGet". A dialog will appear asking you to tick off which files on the page you want to download (select them all). Then hit Go.
*I've heard FlashGet contains spyware. It functions normally after I ran Ad-Aware, though. If anyone knows of a better program that downloads all links on a page, post it here, please!
