CP, it's an older IDE drive. I'm not looking to install them internally (not comfortable opening up my PC and dicking around with it), was hoping to turn it into an external since those are much easier to deal with.
ezzy, I did try 2 different cables, both of which had previously worked. It was only about a day between when I last used the drive & cable, and when I put it into the enclosure. I've Googled and tried a bunch of stuff, and at this point everything is directing me to a recovery service. Unfortunately I don't have any tech buddies that I'd trust to recover the data, seeing as how most of it is stuff I've saved from this site and similar ones.
Thanks for the suggestions, though.