Thanks to Mike for the following correction on my list of shock mount bases needed: "The single receiver shock mount for the AN/ARR-2 or AN/ARC-5 is the MT-5/ARR-2. Mike / KK5F" Not "MT-65" as I originally posted. Not that there is much hope of finding these hens' teeth, but hey, it doesn't hurt to ask. 73, Ken W2EWL