At N2RGA Cable we Hand make every cable, and Inspect and test with a FTM-400xdr.
We have Individual Head Extension (Remote) Cables for FTM-400, FTM-100. Individual Microphone Extension cables for 6 Pin and 8 Pin Radios. and Head Extension and Microphone Extension Cables in Sets
We Now have ICOM Control Head and Mic Extension Cable
OPC-1156 and OPC-440 Equivalent