Hi,don't know if you've had any luck in finding parts for your Bounder?
But we had a rear fender skirt rip off and break.. spent ages searching for a reliable and good value place for a replacement. Never even thought to try Fleetwood..
Got ours done a good while ago but think its this place I just found again after reading your post..
RV Parts - Sierra Engineering Co., Inc - Obsolete & Hard To Find RV Replacement Parts
They list both front and rear fender skirts for our 1987 Bounders in fiberglass, colonial white etc.. The lead time on it was excellent and got the finished piece quickly.. What was really good was the customer service and the fender skirt was straight and excellently molded with perfect gelcoat .
Price was very reasonable from what I remember certainly not more than around $100 .