FZ1 / FZ8 Pillion Seat - Does either directly fit to FZ1-S

[moffmeister]

does anyone know if the FZ1 (naked) pillion seat will fit the FZ1-S? And/or is the FZ-8 seat compatible (with FZ1-S)? I didn't fasten mine down properly (for the second time ?) and when arriving at destination it was gone... :\
Or if anyone has a spare pillion seat??