{Collins} microphone for Collins MR-201 VHF FM set ??

The radio restoration gang on board the USS Iowa is trying to find a mic
for their AN/URC-80 (Collins MR-201 VHF FM set).
Microphone, Dynamic M-159/UR   Collins part number 622-1969-001
Does anyone have an idea if there is commercial equivalent? Or have the
specs for this mic?

best regards,
Nick England K4NYW

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