Vacuum cleaner Miele S4211 for spares (Aigburth L17)

Miele vacuum cleaner S4211 for spares. l managed to get the motor back to work after changing the carbon brushes, sanding the commutator with emerald paper and clening it but the motor keeps sparking like mad and is not save to use. However, if you replace the motor (the picture shows the motor you need), you get a working vacuum cleaner.