I don't know of anywhere else to get them but I can assure you that Newsgroups are actually very easy and very quick indeed.
I wrote the following a few years ago so some of the links are out of date but the principles are still the same (Astraweb now offer 110Gb for only $25). I now always use NZB-O-MATIC PLUS to download binaries which is explained on Part 2 of my tutorial.
http://homepage.ntlworld.com/russdawson/news.html
http://homepage.ntlworld.com/russdawson/news2.html