I think that's the one piece "floor board" with the rubber mat, right? Looking for one of those for my SSXL LTD as well (looks like pic attached).
Wondering if the one from the Gran Sport may be the same (the parts list shows it as the same shape but not sure if they're exactly the same ).
I just got a Rally Sport and I know that setup is different... three piece with two side covers plus a top rubber piece.