I'm looking for one of these old Apple serial modem cables DE-9 to DE-9. I've never actually seen one and until I found this official Apple picture, I didn't think it existed.

http://farm4.static.flickr.com/3146/2295069673_a9038bde05_o.png

The typical version of this cable usually found is the old Apple II-style triangular-shaped with screw heads, not thumb screws.