where to get this electrode input socket head?

[loop123]

This cable is expensive so I want to build one. I know where to get the round silver plug at right which is a 7 pin Amphenol and I know the pin designations inside.

I want to know if the left white electrode input socket can be found any where or it can only be made special at factory. Have you seen anything like it being sold anywhere?  It's 1.5mm Touchproof sockets.

The red (+) and black (-) input is differential with a ground/reference at middle. Should I use twisted wires like used in ethernet cable as the cable? What is the size of wire I should use. How many feet before it can cause enough noises? Signal is 2kHz.

[inse]

How should anyone give advice on the cable as you are not giving any details?
If it’s a medical device, special considerations should be taken into account.
The plastic connector looks custom molded, could be replicated with single contacts in a (3D printed) holder and sealed in heat shrink.
But I doubt you will get it as rugged and sealed as the original, but if it‘s cheap enough to replace it when it fails, go for it.
For cable configuration: open the Amphenol connector and have a look.