I know, that’s the problem finding one!9V seems rather high for a vibrating motor.
They are usually 1.5V - 3V motor.
Looks the same as used in mobile phones. As someone else commented; 9V seems a bit unlikely.
Put a zener diode in series with it, or a small regulator.Thanks, it needs to be 9v though.
Off the shelf kit is probably about half voltage to suit lithium battery - and correspondingly about twice the current.Put a zener diode in series with it, or a small regulator.