Just bought a new GX 550 and thought I was buying mats as in my last three Lexus vehicles. I bought this as an add on option, buy on delivery see a " strip" of mat in the back, but that was it, nothing for the rest of the cargo area. Dealer says Lexus does not make them and there are none available. This seems very odd for a premium brand. I bought them for my last five Lexus SUV's and feel a bit short changed. Anyone know what's going on ?