I appreciate your help, but I have actually been looking for the rear cargo mat for the 7 seat post-2017 MX. As far as I can tell the only one available is this one, and it does not properly fit the later year models.
https://www.amazon.com/3D-MAXpider-M1TL0011309-All-Weather-Stowable/dp/B07SVKC5LC