If you’d like to try some pure silver RCA analog interconnects, here is what I have gone to without breaking the bank. The wire is 18 ga single conductor solid silver, and in my experience is not bright, but has excellent transparency, detail, and ease. Can be done for about $200 a set, if you can solder (I use Cardas solder).
One set of AECO gold plated copper RCA connectors:
Enough 18 ga wire with “similar size semi-clear teflon jacket” ($6.98/ft) for four leads of the length you need (two leads per channel): https://www.tempoelectric.com/cables_DIY.htm
I just braid the leads loosely together with enough separation to reach connectors at the ends.
Good luck!