Amazon.com: Aviation Headset Adapter,Helicopter to General Aviation Headset Adapter Cable,Convert Helicopter Headset to Aviation Dual Plugs, Dual GA Plugs to Nexus 4 Conductor - No Need to Set Up,Plug and Play :
aviation headset bluetooth adapter helicopter BT-Link – UFQaviation
Aviation Headset Bluetooth Adapter UFQ BT-Link with 3.5mm cable | eBay
5-Pin to General Aviation Headset Adapter Cable – Rugged Radios
aviation headset bluetooth adapter helicopter BT-Link – UFQaviation
FlightHelmet.com: Flight Helmet and Headset Cell Phone Adapter