So while it's a bit too late for me, it appears that there are finally updated cargo area mats available in the Tesla shop.
In particular 5-seater mat: Tesla — Model X All-Weather Rear Cargo Mat - 5 Seater
I guess it might have been available for a while, but I only noticed it now
In particular 5-seater mat: Tesla — Model X All-Weather Rear Cargo Mat - 5 Seater
I guess it might have been available for a while, but I only noticed it now