I'm assuming you're talking RCA connectors here?
The
Canare LV-77s is double-shielded and has a stranded center conductor. It should work well in a shielding sense. It's the equivalent of Belden 8281F.
You can get completed cable assemblies in custom lengths using the Canare cable from Blue Jeans Cables. They also use the Canare crimp-type connectors. I have no affiliation with them. The crimp-type connectors bring the shield out all the way to the connector mating plane, so they don't require a pigtail as many solder-type RCAs do. This improves shielding and also makes them suitable for video or S/PDIF usage.