I have two rear door solenoids (CL-02 Central Door lock Activator) for a Nissan Micra.
Have been told that they might fit the Cube - but no one could give me a def answer. So no guarantees - but most things from a Micra do fit
They are yours for £20 plus £5 p&p.
If you are having problems with your doors it might be worth giving them ago.
Let me know if you are interested