need the full 'cartridge' less the motor

 

bttt!!!!

 

the cartridge is the same on the 90 spec ones, it's the splines that are finer than the coarser earlier versions

it's the actual roof aperture that differs on some cars so if you have the actual motor and wiring and (most importantly) the bracket to secure it into place, it's a doddle to get a replacement cartridge

just make sure the cables haven't come out as they will pop out when you least expect them and it ruins the roof

 

or just use your mech and a Granada spline gear in a sierra motor
I welded some ears to the motor bracket to hold the cover on when fitted to my old saff cos