8 pin round to 8 pin modular (RJ45) microphone adapter for Icom, OPC-589 equivalent - TechnoFix UK
Icom OPC-589 - Microphone Adapter Cable
Icom OPC-589 Microphone adapter IC-7000, IC-706 modular NEW from Japan 4909723705437 | eBay
Amazon.com: USB Audio Adapter - VENTION USB External Stereo Sound Card to 3.5mm Headphone and Microphone Jack Adapter for Windows MAC Linux PC Laptop Desktops PS5 : Electronics
ICOM Microphone adapter OPC-589 (clone by RNZ_LAB) - 4 & 6m Ham Radio blog