Alternatively, Pajero 4x4 system isn't rocket science tbh. Paying 2400 labor is still obscene.
Though you have this diagnosis now, why dont you google a few Pajero or Mitsubishi Garages and ask them to quote you if you bring all these OEM parts from habtoor?
You can easily filter garages based on reviews and ratings these days.
My generous bet would be close to 500 dhs on the outside garage for the labor.