Stator cover?
The stator is in the alternator and there's no cover for that besides the alternator housing.
If you're talking about the covers on the ends of the crank, the left one is called the Starter Clutch Cover, the right one is the Signal Generator Cover. These two covers are interchangeable on all B12's and also interchange with the 1127cc motors in the air/oil cooled GSXR1100, GSX1100G & GSX1100F Katana.