Everything has to be fabricated from scratch. That commutator is not an item you can pick up at the local Marine Supply Store. Many surrounding parts must be replaced as well. This is kind of like replacing a damaged generator in one of our hydroelectric turbines. Big job. It will be entirely private companies doing the work.
I wouldn't have thought that. I also wouldn't have thought the motor in a ferry was as unique as a turbine in a hydroelectric plant.