[Milsurplus] AN/GRC-9 question regarding remote operation on a land line

[jcoward5452 at aol.com]

Folks,
 I hope everyone had a good time over the Holidays with family and good friends!
My question:
 What is the correct remote unit (RM-?) or possibly units that would be appropriate for use with the AN/GRC-9 and say a BD-71 swithboard and EE-8's field phones? All my gear is so nicely packed up in storage that I really don't want to go digging for the answer,so if anyone has a clue I'd appreciate a reply.
 Thanks,
             Jay KE6PPF