AutoCAD Updates and Service Packs only are available from the Autodesk page "Updates and Service Packs":
AutoCAD Architecture 2010 Update 2
AutoCAD Architecture 2009 Update 3
AutoCAD Architecture 2008 Service Pack 1
AutoCAD Architecture 2008 Service Pack 1
AutoCAD 2002 Service Pack 1 english locked
AutoCAD 2002 Service Pack 1 english unlocked
AutoCAD 2000i Service Pack english locked
AutoCAD 2000i Service Pack english unlocked
AutoCAD 2000 Service Pack 2 english locked
AutoCAD 2000 Service Pack 2 english unlocked
AutoCAD 2000 Plotting Update Patch
AutoCAD 2000 Update Patch 3D Grafics System (engl.)