I cannot answer the original question.
But: do you need ez_setup at all?
From your text it's clear that you are using Python on Windows.
Therefore I suggest you to forget about the obscure Python installation
tools and look at:
http://www.lfd.uci.edu/~gohlke/pythonlibs/
Find there the Python modules that you want to install. Then just download
the proper windows installers (for the module and all its prerequisites) and
install the modules' binaries in the way which is usual in Windows.
Or are you trying to install a package that is not listed on the
above-mentioned site?
Peter
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