Medusa motor stopped working

[lambchops]

Was running my car yesterday and all of a suden it groud to a halt making some nasty noises, Ive stripped my Medusa 2000kv motor and from what i can see the magnet which surround the shaft have all broken in half about half way down the shaft, does this seem possible and can you buy spares for these? what would cause this type of failure?

If its fubar think i will try the new LRP motor..

Thanks