The PDE zip file was obtained from:

http://www.eclipse.org/downloads/download.php?file=/eclipse/downloads/drops/R-3.8-201206081200/org.eclipse.pde-3.8.zip
http://download.eclipse.org/eclipse/downloads/drops4/R-4.3.1-201309111000/download.php?dropFile=org.eclipse.pde.source-4.3.1.zip