Also buying a case and then putting your own drive in it is a good way to go. I have this one and I'm happy with it. http://eshop.macsales.com/Catalog_It...em=OWCMEFWU2A6
These cases are nice and they support both USB2 and FireWire, just add your own ATA drive.
I buy everything mail order http://www.warehouse.com/
Or any of the other ones, there are a bunch of them. You should see how many catalogs are in my mailbox each week.