The CDT zip files were obtained from:

http://www.eclipse.org/downloads/download.php?file=/tools/cdt/releases/indigo/dist/cdt-master-8.0.2.zip
http://www.eclipse.org/downloads/download.php?file=/tools/cdt/releases/juno/sr2/cdt-master-8.1.2.zip
http://www.eclipse.org/downloads/download.php?file=/tools/cdt/releases/kepler/sr1/cdt-master-8.2.1.zip

The zip files include the sources.