Headset Buddy: PC Computer Headset to Phone Adapter - Dual 3.5mm to 2.5mm (01-PC35-PH25) $10.95 B002D41HKS
Headset Buddy Xbox 360 PC Headset Adapter Cable (PC35-Xbox360) $11.00 B0035AMM76
Headset Buddy Agent Buddy Side-by-Side Training Switch Adapter for RJ9 RJ10 RJ22 connections (HM-RJ9) $22.50 B005LKRB4M