Amazon.com: EMK TRRS 3.5mm Aux Extension Cable, 4 Pole 3.5mm Male to Female Audio Cable Gold Plated Stereo Aux Cord for Headphones, Laptop, Speaker (3.5mm TRRS Aux Extension Cable, 1.5 Feet/0.5M) :
Amazon.com: CablesOnline 3.5mm TRRS 4-Position Female to Dual 3-Position 3.5mm TRS Male Headset Splitter Adapter (IP-AY12C) : Electronics
Cell-phone TRRS Headset - Earbud Headphones w/ Microphone : ID 1966 : $3.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Amazon.com: YCS basics 3.5mm Smartphone TRRS Headset to TRS Headphones Adapter (Removes The Microphone Channel) : Electronics
HamiltonBuhl Motiv8 TRRS Classroom Headset with Gooseneck Mic and In-line Volume Control
About TRRS | Schiit Audio
HamiltonBuhl Flex-Phone™ TRRS Headset with Gooseneck Microphone for K-5 - HamiltonBuhl
3.5mm Headset Audio Mic Splitter AUX Adapter TRRS 4pole to 2 TRS 3pole Female | eBay
Aktudy 3.5mm Mic Headset Splitter Adapter 1 TRRS Male to 2 TRS Female Y Audio Cord - Walmart.com
Amazon.com: CableCreation Aux Cord for Car, 3FT Right Angle TRRS 3.5MM Male to Male Auxiliary HiFi Stereo Cable with Silver-Plating Copper Core Compatible with iPhones,Tablet,Headphones,Speakers,Black : Electronics
StarTech.com 2m 3.5mm 4 Position TRRS Headset Extension Cable - M/F - Extend the connection distance between your iPhone, mobile phone or computer headset by 2 meters - trrs extension - 4
Headphones & Earbuds - HamiltonBuhl® Flex Phone TRRS Headset with Mic