Final up date. I ended up getting the front drums through Fleet Pride. They got them from Webb they were part number 65555B cost $873.00 each. Total brake job all four wheels ending up costing about $4,800. Coach has 136,000 miles and at least 50,000 of the miles we were towing a car without brake assist installed.
Here are the lessons learned, have brakes checked every time new tires are installed, always drive with engine brake on and use a brake assist in tow car.