Here’s another new harp mic. This one is high impedance so it might make a decent mic. You can get them for 48 Euros on some websites, but I don’t know where you can buy it in the states.

Superlux Ships D112/C Harmonica Mic

note: I found a buy-it-now on ebay and I have one on the way. I’ll probably dump the element and put a crystal in it if it is just another dynamic vocal mic in a harp shell.