Telex was acquired by Bosch. I deal with Bosch on an almost weekly basis for my day job. I don't have any desire whatsoever to bark up that tree.
I would contact EV support and see if they can help.
As a reseller, they are already getting a decent deal compared to MAP.
Who is "they"? If the city council is a Telex/EV/Dynacord reseller, then I'm not sure what to think about this situation.
I was notified they do not use the mic switch.
Aha. Then you have lots more choices.
These seem comparable:
EV RE90P-18
No experience and appears to use a different capsule than PC.
AT U857Q
I always liked the 857. It's a neutral and well behaved mic.
Shure MX418/C
Shure 185 capsule. Kind of the SM58 of talking head AV. I think their windscreen is mediocre compared to the EV and AT ones. They can sputter badly with windy talkers. Of course, if we're honest, all these mics have windscreen/plosive issues. The 185 sound quality is overall pretty good.
Shure CVG18-B/C
Not sure what capsule this uses but assume 185.
Be aware that the Shure mics are usually much higher in sensitivity than the EV. Not sure about the AT mics. It's been a while since I've used them and I'm not inclined to look up the spec sheet.
This is my 2 cents, for whatever it's worth.