I have the Galaxy Pluto. 4 pin wired. I remember you saying something in the past about the transformer in the RK 56. I have a spare I wouldn't mind getting out to improve the 602.
The first step to wiring that microphone is unsoldering all the wires that attach to the switch and you basically strip the microphone down to its individual parts and then you reattach everything a different way and you throw the amplifier board in the trash. If you end up using the Transformer, the black and brown wire connect directly to the microphone element and the red and yellow wire connect to shield and audio respectively with a .1uf cap between yellow and audio wire.
Found another one for $23.75 with free shipping. This one has the round button on the back. http://m.ebay.com/itm/181726629797