I have the misfortune in getting involved with an couple of Eicon S91-S/T X.25 interface cards.

The Eicon card has 2 connectors. The one I'm interested in is the Very High-Speed Interface (VHSI). I'm going to connect 2 of these cards together via this port for some back to back testing / software development.
All due credit to our Canadian Cousins, they do give a wiring diagram to wire up a back to back connector. But do they give a specification for the connector? NO! They just call it a 36 pin high density connector.
I need to
locate some male connectors. They need to mate with the pcb mounted female
receptacles.
Molex Look for the 52316 IDT Series Male connector. (Molex seem a bit shy and use the term plug)
I want a solderable connector....
AMP 2-175677-5 or Series Search for 0.8mm, .050, .085 Centerline Miniature Ribbon Connectors (CHAMP)

3M MDR .050 The MDR Mini D Ribbon 3M MDR DHA-RA36-R131N
Instructions for Assembly of 103XX-52F0-008
Series MDR Solder Plug Connector Junction
Shell Kit
.050,Mini D Ribbon (MDR) Connectors looks promising! the Features:
.050,Mini D Ribbon (MDR) Connectors
Solder plug shielded I/O connector
Accepts wide variety of discrete wire cable
types AWG 24–30
Soldering wire contact cup requires no
special tooling
Ribbon type contact: industry preferred
Reliable repetitive plugging/unplugging
Positions: 14, 20, 26, 36, 40 and 50
60-13-036-5200.????
AHA! These plugs are used for high speed printers conforming to IEEE-1284-C connectors!
Cable Plug
AMP
2-175677-5
3M
10136-6000EC
Molex
52316-3611

a face on view of the plug....
Seems to enjoy the name "MINI CENT. 36 MALE(C)"
Well now that I know all that - it's not so bad!
Radiospares carry the 3M MDR connectors
The plugs:
36 way 10136-3000VE 176-1986
The shells:
36 way 10336-52F0-008 299-4632
I find Eicon's web site is difficult to follow, and they change it just as I begin to find my way around it!