Are you asking about the metal corner trim that extends the full height of the RV or the bumper end cap?
I jackknifed my Brave last yr and searching for a replacement corner proved to be no good. None of the RV salvage yards had any as they are a very common item that gets damaged. I had a sheet metal shop make me 2 new ones as both sides had some battle scars. I just replaced the one I damaged as I traded the RV in the next day and the otherside wasnt commented on by the dealership.
2001 Winnebago Brave SE29 Workhorse P32 7.4L (previous)
2007 Fleetwood Bounder 33R, F53 chassis, V10 (current)