Amazon.com: Audio switch box two channel AB A B stereo on off headphone switcher 1/8" 3.5mm jack on/off selector : Industrial & Scientific
LYNEPAUAIO Audio Switcher 3.5mm 2 in 1 Out / 1 in 2 Out AB Switch Stereo Audio Splitter Box with No Distortion 3.5mm Jack for Switching Between Computer Speakers and Headphones - Walmart.com
Sescom 3.5mm Stereo Audio A/B Switch for Mobile SES-AB-SWITCH
Morley ABY Mod #2 - Stereo Input and Mono Output - Peter's GuitarFX
Sescom SES-AB-SWITCH Flip2 3.5mm Stereo Audio Switch [SES-AB-SWITCH] : AVShop.ca - Canada's Pro Audio, Video and DJ Store