Doing a google of this, it looks like the CMP-25B is only a remote microphone for other radios.
http://www.standardhorizon.co.uk/pro...roducts_id=921
I don't mean to sink your boat, but do you really think it's a complete VHF radio?
This is a remote microphone that should work with model VM3500E, GX1500E and GX3000E radios.
Or are you saying you have the entire radio, but this mic is broken?
If the green wire is broken in the connector, then there should be a wire post that's missing a wire, and it should be obvious where it should be re-attached.