Let me get a better link then...CHANGED the link
This product is the Vantec NexStar Hard Drive Dock, however there are several simillar products out there.
I am thinking in term of storing bare hard drives in compartments (such as in an OEM styrofoam hard drive shipping container) and then just plugging them in to something like this. Older drives do not remain in PC cases for long around here as faster, bigger drives take their place. However the older drives are still excellent for storeage, and external drive cases are not worth the effort after the first one or two. Also stored data (photos, videos, music, etc) usually don't leave the house.