Those look very old, you should be able to find a suitable replacement searching female bullet or barrel crimps... you will have to measure the pins and make sure they are compatible. Molex makes some

I have never come across a Studer board and I'm very curious how it sounds... like if you AB to a more familiar preamp... either way I love the old analog gear.

Good luck!

 

I ordered some TE 770520-1 connectors they should do the job!

I will try to do some AB testing sometime soon!