They probably just haven't tried it as you suggested.
The passenger side will fit fine. The only question will be the driver's side, but even if the floor is a little different around the catalytic converter hump it will only be that section, the rest of the floor didn't change. The US cartool connectors aren't a perfect fit to most floors anyway, they require some trimming to make things work.
I wouldn't worry to much about it. Worst case scenario is there's a section that you'll need to add some material into, and if you can weld in the connectors to begin with that shouldn't be a big deal.