Headphones adaptor?

[Guest wibbler]

I'd like to use my Sennheiser headphones with my O2x, but can't find an adaptor with mic to go with them. The one I had for my San Franciso obviously isn't right, I lose one of the audio channels. Anyone know where I can get such a thing?

edit - forget that, think it was just a bad connection. The SF adaptor (actually a Nokia item) seems OK after a bit of messing with.

Edited September 24, 2011 by wibbler