There is a link that will give you the same offline installer as the "Enterprise" link: http://get.adobe.com/reader/direct/
However, this link sometimes works, and sometimes it redirects you to the standard download, where again you need to uncheck the McAfee add-on.
The "Enterprise", as well as the "Direct" link will always give you the latest available installer. But you could give your users a direct download link to the offline installer, e.g.: http://ardownload.adobe.com/pub/adobe/reader/win/11.x/11.0.07/en_US/AdbeRdr11007_en_US.exe (English version for Windows). But you would have to change that every time a new Reader version becomes available.