Be Quiet!'s PC Noise Absorber Kit
 

The Be Quiet! Noise Absorber kit itself works well, but ultimately it's not a product you should jump to first hand – prevention is better than a cure, as they say. Compared to Akasa PaxMate at least I'd certainly recommend this in preference, and considering how much some professional matting costs, I'd again look at this as a nice medium. Be Quiet! has currently very few retailers in the UK though, so it might be hard to get hold of, but if it's really what you're after then the more noise you make the more motivation people will have to stock it.

http://www.bit-tech.net/modding/2007...absorber_kit/1