They come up on eBay every few moths, roughly; going for about under $100. Since you're looking for a spare, it's hopefully not too urgent for you.
I bought one this way (was listed as new old stock), and while it had never been used the insulation
on the mike piece was all weathered, brittle, and crumbling - so while it works, it's certainly not weather
proof. So now I'm wondering how I can "pot" it so it's watertight again but is still flexible. 5200 was suggested, but I am not convinced.
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