It can be found on http://www.tesnexus.com/downloads/file.php?id=27588.

If you have trouble with the installation of python I would recommend that you grab http://www.mediafire.com/file/hfpao6v99ni7n80/Wrye%20Mash%2084DCG002%20install.exe instead.
Here can you find more information about http://www.gamesas.com/index.php?/topic/1106095-wrye-mash-stand-alone/. :read:

I am going to bump this as I believe there are not enough people who know about Wrye Mash's usefulness, in particular BAIN =)