I have some old NOS telephone operator's headsets somewhere or at least parts and cords. The cords have brown cotton (?) braid and may have pins on the ends. It has been a while since I eyeballed them. If I can find them I can take a picture and email to you.
Clifton
:I AM LOOKING FOR A SOURCE FOR WIRE TO REBUILD MY OLD HEAD SET PHONES
:
Here's a possiblity:
https://sites.google.com/site/jackpineradiocords/
I believe that the owner does custom work- should be able to fit whatever terminals you need to match up with your phones.