Webpage Removal

Hi everyone,

I have a client who wants to get an article removed from the internet.
Basically, in a nutshell. The client is currently in the media and a rather undesirable person is claiming that they were in someway associated with my client in the dim & distant past & making some pretty extravagant claims in the article.

Short of taking legal action which my client doesn't want to do (they don't want to attract that sort of publicity), i contacted the administrator of the site & politely asked them to remove the article stating that it may damage my clients commercial & personal interests.
The administrator initially replied via email but now refuses contact.

Any suggestions please from anyone as to how i can go about getting this article/webpage removed from the internet?

It must be a common problem on the net for established marketers managing their reputation so i imagine there is some sort of workable solution or a watchdog that can be contacted, etc. It just not something i've dealt with before.

Thanks in advance for any suggestions.