While on vacation the rear street side window of our Apex 288BHS was broken. Having a very tough time finding replacement glass. Having to buy the entire frame assembly from Coachmen just to get the pane. Flat tempered glass, frameless, tinted, rounded corners, 31" X 21". Anyone know of any other way to replace glass? No RV dealers in Arizona that I have found nor auto or residential houses can help. Suggestions?