Cases are plentiful, easy to find at newegg.com and geeks.com
If you could supply the make, model of the drive, members could look to see if it's a SATA or IDE drive and what size. Armed with that, there are numerous offerings that work fine. I prefer any with ample cooling.
My old XP computer suddenly died. I had most of my data saved on a slave drive (80 gig seagate Ultra ATA). I don't want to lose this data as I had already transferred it to my laptop and an overzealous tech reformatted that laptop and took everything I had saved. I have a new Vista desktop. I want to take the internal drive, buy a case and use it as an external, at least long enough to get the pictures and irreplaceable stuff I have on there. Is that possible? If so, what kind of case etc do I need?