Rear interior quater panel trim

I'm looking for rear interior quater panel trim for my 78. This is the first year it was changed to a fuzzy pinch welt material that matched the interior. It runs the length of the door area from the water diverter to the rear plastic trim molding. The part itself is U shaped and then covered with the material. I cannot locate one through all the corvette catalogs, etc.. Does anyone know where I might be able to pick them up? Hopefully I explained this well enough to understand what I'm looking for. Thanks.