And today I lost the captive lead (Mogami) from my SL1200.
I have fitted a 3D printed box, with some pure copper RCA sockets from WBT. These are connected to the internal tonearm PCB by some OCC wire. I have now added a Neotech OCC coax cable between the TT and phono stage, and I am happy with the result.

It took me a couple of hours to get it all done, but it was well worth it.