My old Hudson trailer (triple axle) has the old style house trailer brakes on it and I am being told that not all the parts are made anymore. I am almost sure I don't have the parts anymore. So should I change out the axles or just try and get at least one brake axle working and go from there. The most I will haul is about 15,000 pounds on the trailer. Towing with a 2010 F350 Dually?