GA Headsets - is there a standard for the replaceable microphone?
It's not a coincidence, the connection is a modular microphone standard called U-172/U. The pins it connects to are the U-173/U standard. 

You can't just get any microphone that has that connector though, it's not aviation specific. You need to get a microphone which has the right impedance and is designed to work with the voltage on an aircraft communication system. There's plenty of options, some which give better noise cancelling properties than others. 

All you need to do is get the parameters of your hurl-covered one and get one with the same parameters. 

There's information on aviation connectors and standards here, and here.