I stopped by the parts department earlier today ...
The part number for the black skid plate is 5ZB47GXHAA in case one wants to swap out their grey one. I can't promise that they are identical but they appear to be so. I'll have mine installed at delivery and report.
The other thing I notice is that the RAM nameplate on the grille seems to have a grey outline around it, presumably to match the grey skid plate ... I wonder if the Rebel black nameplate will fit as they seem to have different grille configurations.