They say that anything that gets onto the internet never really goes away. It is stored or archived somewhere. One of those somewheres is "the Wayback Machine" at web.archive.org where you can find past web pages for almost any web site.
I used it for our own site, ciin.org, looking for an item from several years ago. And after a couple clicks, there it was -- the CIIN site from 2006.
If you are doing research on the internet, and it looks as if a page or site you know used to be there, give The Wayback Machine a try. But be careful; it can be a lot of fun and can pull you in for long stretches.