Okay, so for additional old Macintosh communications cables, namely for means of serial communication with a Macintosh SE, I went searching around on Digi-Key to see if I could find the parts to build my own cable. Indeed, I could, but it appears the Mini DIN-8 cable is very short-stocked nowadays, and the only source I could find stocked the cables in units of 100. Okay, fine, so one way or another, I’ve got to solder the connections. My final verdict was to go back to Amazon, find a cable with the correct connector ends but incorrect internal wiring, break that open, and wire it up correctly on my own.
This is my pick.
20181230/https://www.amazon.com/C2G-25041-Female-Mini-DIN-Adapter/dp/B001BS8O26
This is what I’ve found on Digi-Key. Unfortunately, the manufacturer’s original site is down as of 2018, so I had to find an old copy of the specifications sheet from the Internet Archive Wayback Machine.
20181230/https://www.digikey.com/product-detail/en/assmann-wsw-components/A-KMD-08AFMM-WP-R/AE10174-ND/1089545
20181230/https://web.archive.org/web/20171216045604/http://www.assmann.us/specs/A-KMD-08AFMM-WP-R_REV00.pdf
F.Y.I., the DB-9 connector ends were plentiful on Digi-Key. Of course they have to be, as they were traditionally much more popular back in their heyday too.