How about vistaicons.com?
http://www.vistaicons.com/ If ever you want to find something just run a good search. There's actually quite a few sites now with free and some retail packs of Vista addons. As you can see from the search results here some are still seen when different search engines are used.
http://infospace.abcnews.com/_1_DUYT...Bvista%2Bicons