That's an are where my wife is a lot more informed tham me! She has some custom drapery background and tells me those are part of the "valance" and looking at parts info, that would seem to be a "valance left leg"!
But that is where things begin to go off center as we can't find the exact info for a brave SE for that year!
This is the parts catalog and one might find the correct part number in urtain and cushion listings:
https://catalog3d.winnebagoind.com/menu/Parts.htm
But one would have two problems with that , first being the correct ID of the RV and colors used!
The second and likely larger problem is the match of fabric and it being very uncertain of that still being availble for a 25 year old product! Would the existing fabric begin to match any new?
After speaking to my inhouse expert on fabric, her suggestion is to not even consider new to match old but think of redo on all the fabric!
I've built a number of valance for her work over they ears and it is pretty simple to cut out the wood and staple the new fabric to it.
Several thousand dollar valance have been built in my shop with pretty simple tools! Then el brackets to screw them to the wall and it may all be easier than trying to find the parts!
Custom drapery shops would build them but like mentioned we get paid pretty nicely for that custom work!