As of SAS Management Console 9.2, the doc.zip file doesn't seem to be installed any more. If you have access to an old SAS Management Console 9.1 installation then you can find the doc.zip file, otherwise I'd suggest asking SAS Technical Support to see if you can get a copy.
The first version of our Metacoda Plug-ins was developed for use with SAS Management Console 9.1. Since then the SAS Management Console plug-in API changes, from our perspective at least, have been very small and our plug-ins also run in SAS Management Console 9.2, 9.3 and 9.4.