[Police] Soul Cages demos? huh? wha?

Hi all - Delurking... Someone mentioned that there was a studio version of "Ain't No Sunshine" in a "Soul Cages" demo set. Can whoever posted this describe these? Sting's one of the few artists whom I rarely see have bootlegs of demos floating around. While we're on the subject, any traders out there? We just got a CD burner, and I need to christen it... thanks - Ken -