Where Can I Download The Oblivion CS?

The first page of google search results from the query "download oblivion construction set" seems reasonably chock full of sources.

Google is region specific. The first page I get is: http://www.elderscrolls.com/downloads/updates_utilities.htm, not http://cs.elderscrolls.com/constwiki/index.php/Main_Page, which is probably the page you refer to.

Forget that. The first search results page should provide plenty of resources.