4 pin 'Amphenol' to 3 pin 'XLR' adapter for Shure 545 microphone

Hi all!
I found a nice older Shure 545 (Series 2 - "pistol grip") microphone that needed some work, at a garage sale.
One of the challenges is that I would like to find one of the adapters that Switchcraft used to make (#L3MN), that would adapt the 4 pin 'Amphenol' connector on the mic base to the now more standard 3 pin 'XLR'.
It looks like Switchcraft doesn't make that L3MN adapter anymore, but I just thought I'd put out feelers to see if any of you have seen anything like that or may know of a good alternative?

Thanks for your help and leads,
Buck