I've made up interconnects from Mogami 2534 cable and they are the lightest weight cables I've ever handled, thin and fairly flexible. They're also inexpensive relative to most interconnects.
https://www.proaudiola.com/product-p/1-m2534-rca-rca-1.htm
https://www.proaudiola.com/product-p/1-m2534-rca-rca-1.htm