Keystone Fuzion trim help

Hello all, I have a 2009 Keystone Fusion. Along the bottom of the exterior all the way around there is a black plastic or fiberglass skirt about 16 inches wide. Where that meets the gel coat there is a piece of black or grey trim that goes all the way around. It's not the plastic/vinyl trim that typically covers the screw rails/tracks, its rubbery and "D" shaped in cross section.

Anybody know what this trim is or where I can get it?

Thanks,
Eric