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Driving through a construction zone with plastic barrels and hit one that was out of line.  No bumper issues, but lost a hubcap AND the TRIM around the wheelhouse on the passenger side.  Went back to look, but could not find.  The TRIM seems to be the same at all four wheelhouses.  It's just some kind of plastic.
ANY IDEA WHERE to look for a replacement?  Some might call this a fender skirt, but it's not very big.
My coach is old (1982) last serial number digits 016. 
If I can't find an identical replacement, any ideas for sourcing a new SET (or at least a pair) that might be made to fit?

Thank you for any ideas!

Those look identical to the ones on my 490, mine are fiberglass. I would call it a fender flare or fender trim. 

I do not know for sure but I would suspect that Newell makes those out of fiberglass. Not sure if they can make you a new one but I would call them and see.