SP2:
http://www.microsoft.com/downloads/details.aspx?FamilyID=049C9DBE-3B8E-4F30-8245-9E368D3CDB5A&displaylang=en
SP3:
http://www.microsoft.com/downloads/details.aspx?FamilyID=5B33B5A8-5E76-401F-BE08-1E1555D4F3D4&displaylang=en
But, if the SP2/3 installation require official system, you can't solve that. another way is to down individual patches that the SW may look for. If the SW is looking for SP2 tag ... don't know.
http://www.microsoft.com/downloads/details.aspx?FamilyID=049C9DBE-3B8E-4F30-8245-9E368D3CDB5A&displaylang=en
SP3:
http://www.microsoft.com/downloads/details.aspx?FamilyID=5B33B5A8-5E76-401F-BE08-1E1555D4F3D4&displaylang=en
But, if the SP2/3 installation require official system, you can't solve that. another way is to down individual patches that the SW may look for. If the SW is looking for SP2 tag ... don't know.