The files were posted about 2 weeks ago. If you're getting "Article not found" messages then the files are no longer on the server.
When using the binary newsgroups you need to know about the server's "retention".
A server you access for free through your ISP will generally have a retention of 7 days or less. Premium pay servers can have retentions of 150-200 days.
If the articles are now gone you will have to either sign up with a premium provider, or wait for the torrrent.