My system is mostly wired with Morrow, series 3 and 5 interconnects. They are a good value, IMHO. I needed a short length of RCA cable due to the addition of a transformer, and just as a placeholder, I ordered the house-assembled Audio Quest RCAs from Audio Advisor. I was afraid they would be a bottleneck for the whole system, but I was pleasantly surprised. I couldn't audition the cable without the new transformer, which I used to solve a hum issue, so I can't say how much of the sound is from the cables or the transformer, but system is just kicking butt right now. Sounds better than ever. AFAIK, custom lengths should be available in this affordable cable.
https://www.audioadvisor.com/mobile/prodinfo.asp?number=AQBMII
https://www.audioadvisor.com/mobile/prodinfo.asp?number=AQBMII