Amazon.com: Ancable 3-Pack 3-Feet 3.5mm Male to 2.5mm Male Replacement Cord for Xbox One Talback/Chat Cable, Turtle Beach X11 DX11 PX21 X12 PX3 XL1 Headset and Astro Gaming A40 A50 Headset :
3ft 3.5mm to 2.5mm Cable Cord for X11 DX11 PX21 X12 PX3 DPX21 XL1 XBOX live Chat | eBay
Ancable Replacement Talback/Chat Cable, 2-Pack 3-Feet 3.5mm Male to 2.5mm Male Cord for Turtle Beach X11 DX11 PX21 X12 | Walmart Canada
Amazon.com: Turtle Beach X11 / PX21 Talkback Cable 2.5 mm for XBOX 360 : Video Games
Upgrade Adapter Cable Set For Turtle Beach Headset DAC1 To 3.5mm Ear Force Play Station P11, PX11, PX22, PX21, X12, X11, Z22| | - AliExpress
Turtle Beach Ear Force PX21 Head Phones for the PS3 - Sam's Club