Name That Circular Connector -- *update* Hirschmann WIST 10 perhaps?

Hi all,
I posted something related to this in the lab, but I thought I'd cast a wider net.
Does anyone recognize this (approximately 15mm diameter) circular connector?

I need to make a cable with one of these at one end and a 50 pin dsub at the other end in order to couple a pair of studer 169 consoles.
Even a wild guess would be appreciated as my eyes are going bleary from the all the pdf datasheets that i've been poring over to no avail.

A kind soul on another forum guessed Hirschmann...
Turns out the Revox A77 used the Hirschmann WIST 10 for the remote control
looks the same to me:

agree?
Anyone have any of these for sale or know where I could buy one?
Thanks in advance.
Edit found one. thanks

possible to replace the connector all together.