>You gave us the "what", but not the "why". Why did you need special cables?
I am old, I predate 'standard' standard serial cables. Lots of older computers had sorta-almost-but-not-quite-standard cable wiring, and a lot of old printers and other gadgets would only work with the cables wired just a certain particular way. Lots of early modems would not work unless the cables were just so either.
One of the problems with standards is when you make too many things optional in the standard, you end up with a whole bunch of stuff that is almost but not quite compatable....
And then there are all the cables I made for people who bought Mac computers because they were different from the monotnous IBM standardization....Which of course meant they had non standard cables...
In case you are wondering how old old is, I built my first computer from parts...not boards plugged together, actual parts soldered together one by one....(and when I turned it on and the dang thing actually worked I was amazed, I figured there were about 2000 soldered connections in it, each of which *had* to work....
Ahh...the good old days LOL
(8K of memory, 1megabyte disk, keyboard, and a video display, no sound, no game pad, no modem, the internet was a few years later...)