Thanks for this Thread!
My jazz had ABS light on since i bought it and i wanted to replace the whole pump aswell. Luckily i came across this post sooner than i got some replacement pump

Removed the motor from the module, split the rotor apart from the metal plate with bearing and then sourced some larger brushes which we sanded down to the correct dimensions to fit. Also cleaned the contacts where brushes were touching the rotor (mine were completly busted). Then it was just a matter of putting it all back together and stuffing it back in the car. Voila, ABS is working again!
Note: the plastic carrier which houses the brushes and power probes may be brittle and the clips holding it in place on the metal plate CAN snap off. We got around it by using very small selftap screws and a 1.5mm drillbit.