Usenet file search?

Hello all,

I remember coming across a few of these search engines in the past that will search newsgroups for a file name, or partial file name, and return back the various newsgroups that contain that file. But for the life of me I can't remember the site names right now. Google groups only searches text in posts, it doesn't seem to search binary names. So I'm wondering if anyone can suggest a site that does allow you to search for a file name, and tell you what newsgroup might contain that file?

Thanks in advance