1 RCA Male Mono To 2 RCA Female Stereo Audio Splitter A/V Y Cable Cord - AliExpress
0.5ft (0.15m) Value Series™ One RCA Mono Male to Two RCA Stereo Male Y-Cable | Audio Adapters and Couplers | Adapters and Couplers | Audio Video
Amazon.com: CableWholesale 3.5mm Mono Male to RCA Male Cable, 3.5mm Audio Auxiliary Jack on One End and RCA Audio Jack on Other End, 6 Feet, Black : Electronics