Had a busted hard disk enclosure? This shows how you can replace the damaged enclosure with a clear plastic book case.
Step 1: Salvage parts
Salvage working parts from the damaged enclosure. Most important of these are the IDE to USB adapter connected to the hard disk inside and the external power supply (the 3.5" hard disk enclosure variety has this)
My aluminum 3.5" hard disk enclosure fell and had a serious dent that damaged not only the case but the hard disk itself. The disk shown here is an old seagate 20GB hard drive from my wife.