I think replacement parts would be necessary, and replacing the rotor should not be a problem.
Not sure if Patek would replace the bridge you noted.
The other bridge pictured, which also has scratches, has a serial number (I believe), so Patek may decline to replace that one.
Hope you got an amazing deal on the watch. These fixes won't be cheap and Patek will require a full service.
Who was the dealer? What a butcher!
John