I got an icy box a couple of weeks ago for my 200gb hard disk, absolutely amazing (its glows blue :D ) Its made of aluminium so it doesnt need a fan and its a very nice size. I bought mine from some company called planet micro for £28 inc P&P. Id never heard of them but the delivery was very good (however, the item looked used...) It worked very well though and I got it at a good price so I don't really care.
Theres a few different versions, USB, firewire, USB + firewire, SATA etc. Check out click here never ordered from them before, just saw them in a pc mag. theyve got free delivery and the prices are alright. Hope thats some help