XML sources tarball

I want to compile the PHP manual for use with the Vim text editor, to make plugins for context help, autocomplete and such (I know that there is a vimdoc version already, but want a more complete one). I wish to use the XML sources for that, but CVS is rather unfriendly, especially when sitting behind a firewall. And the great number of files download very long. Is there a snapshot (tarball/zip) of the docs source tree? If it is, a link on the http://www.php.net/download-docs.php would help others who need just the files. If not, I suppose it would be good to make one sometimes. It may be made quite rarely as most of docs seem to not change often (or do they?).