What you need to do is differentiate between the infinite number of fancy cases, and the disk drive inside.
Yeeeeees . . . I was sold on that from birth. This adorned my bedroom, I imagine before you were born - though mine was as new. 30/-.
http://www.radiomuseum.org/r/mil_gb_...7_r1132ar.html
Ooops, you've added to your post. Reading in.
(b) Go to the "business" section of said website
(c) Take a look at what they have listed under "Nearline Drives" or "Datacentre Drives" (you could look at "NAS Drives" too, but they tend to be mid-range drives).
The search is on.
NB I had put some - but not all - trust in a Seagate Black Amor. It worked well for a couple of years but then fell over about house sale time. My PC drive carried in bubble wrap in carry on bag - was DOA.
To be fair, my den was dusty due to a tiled ceiling that I'd assumed had another layer on top of the tiles. It wasn't until I started refurbing watches that I became suspicious.