A quick look on Google produced http://www.electronicsoutfitter.com/store/cs-100.html from froogle. I haven't used these but they look decent and it's noice cancelling so any fan noise in the background should be gotten rid of. I use noise cancelling stuff on my motorcycle headsets and that works really well.
I wonder if they'd cover the entire ear (like a cup) or not. Good price though! _________________ A letter to a soldier