I've been looking into it, but I doubt it'll happen in the near future. I consulted a PhD scientist who worked on PVC products for BF Goodrich. He walked me through how such a floor mat can be made. It requires a large mold and the whole thing has to jell into shape at once. You can't simply take an existing sheet of rubber and stamp it, because the grids on top will be very shallow.
I also had an IM exchange with Gabe on this board, who works for Toyota. My understanding from him is that these mats were made by a department within Toyota, rather than by an external supplier. His sources said that the mold may have been scrapped already.
The other challenge is from the business end. Most floor mat manufacturers don't want to do this project. There is too much work and not much return for them. It's way more profitable to make smaller, universal floor mats that you see in auto stores.
Despite the above, the fat lady hasn't sung yet. I'm discussing a couple of approaches with my manufacturing partner. At this point I just can't tell how things are going to turn out.