I damaged my rear wheel on my commute home last night. I'm assume i hit one of London's notorious potholes a bit too hard. The result is that two spokes are no longer attached to the hub body - one of the (plastic) raised parts of the hub which anchors the spokes to the hub in pairs has broken off. Its a Mavic Ksyrium Elite wheel about two years old in otherwise very good nick. Is this all over for the wheel or fixable (new hub?) at less than the cost of a new one. Any advice would be great, thanks.