The org.eclipse.platform-3.x.x.zip file was obtained from:

http://download.eclipse.org/eclipse/downloads/drops/R-3.8-201206081200/download.php?dropFile=org.eclipse.platform-3.8.zip

The 4.2.2 version was obtained from:

http://download.eclipse.org/eclipse/downloads/drops4/R-4.2.2-201302041200/download.php?dropFile=org.eclipse.platform-4.2.2.zip