Like many others on this forum I have a couple of Sennheiser Evolution G2 100 Series wireless lavalieres. Sometimes I don't or can't use them wireless, but didn't have an adapter to convert them to wired. I checked on the Cow for a solution and didn't really find one. But i did manage to find a simple solution from Sennehiser themselves:
What I like about this option is that it is made for the ME 2 microphones I'm using which has a screw-lock mini connector (3.5mm), and it has a belt attachment. However, it isn't cheap. So if you are looking for a solution as I was, I'm glad to pass on this bit of information.