X2
When they replace your masters you REALLY should replace the front brake line hoses at the same time. just saying because they are going to fail down the line too. I thought I was a goner coming off that ramp when mine failed!
Regarding availability for 96-98 models. Mine was on a 1997 Ford V10 450 chassis. I HAD to order OEM brake lines for it. They ordered them and they were there the next morning.
Good luck, glad your and your family were ok and you didn't have an accident. Happy Safe Rv'ing when you get your brakes fixed. :C