Can you post some photos? Front view of the final installation w/a tape-measure in the photo would give some good idea of what folks should be looking for, maybe a skewed view of area w/the molding installed, then an end view of a piece of the molding again w/a tape measure for perspective.
Are you looking for only the reveal piece, or also the aluminum track piece that acts as hinge for the storage bay doors?
Baja-tested '08 2-slide 36'
Alpine: The Ultimate DIY'er Project