That may be a new Policy since many people have had earlier coaches repaired at Prevosts expense. I would get a name.
Also, a cost of that size seems high. Are your refering to replacing just the panels in between the Galley and bedroom slide?
What Prevost has been doing is re glueing in place and adding a mold on the seams. That doesnt cost much.
If you had to take off the stainless skins all the way around the bus and replace with new, and then polish and paint the bus where paint occurred, I can see it being expensive. However, I know of at least one person who had all of this done at Prevosts expense and he was not the first owner and the Coach was early 2000's.