Ebuyer sell notebook hard drives... You'd have to check on compatibility tho. for example an internal 80gb notebook drive for 61.29 + p&p
http://www.ebuyer.com/customer/produ...duct_uid=30963
It should be noted that some people have had problems with ebuyer - I'm not one of them however. I've never had cause for complaint. But it's worth thinking about.