Hi John
The 'extended' version of My Sex that is on Glimmer comes from the album
Live From A Room (As Big As A City) which John Foxx and Louis Gordon released in 2006 (METACD010)
Amazing, isn't it?
There's an interview somewhere in which John Foxx explains how he liked Louis' updating of the old version and Louis liked John's 'new' version so much they decided to work them both together.
It's been performed live in this new format on most of the tours they've done together since - and (I think) it's currenlty available live from Sydney on Metatronic.
Hope that helps