100x RCA Phono Female Coax CAT5 To CCTV Camera Video AV Balun Connector Adapter | eBay
SOUTHSKY Audio Converter, Stereo Analog to Digital Converter Adapter, 3.5mm Aux Jack R/L 2 RCA Cinch to SPDIF,Toslink, Optical,Coaxial Converter: Amazon.com: Industrial & Scientific
SHIYAO Optical Coaxial Digital Analog Audio Converter Cinch Adapter - Walmart.com
Aux/3.5mm to RCA/phono male adapter cable, 2x RCA/phono plugs - KabelDirekt
134-1000-037 Cinch Connectivity Solutions Johnson | Connectors, Interconnects | DigiKey