I have a Heil 8 pin Icom (blue) mic connector with external switch option to a XLR4 pin microphone. I also have the Icom OPC-589 8 pin round to 8 pin modular.

https://www.dxengineering.com/parts/hls-cc-1-i

https://www.dxengineering.com/parts/ico-opc-589

Both pieces $25