It's not Toyota, it's the US government. Something about not meeting safety standards, probably emissions too. Yet for some reason safety standards are non-existant on motorcycles?? By the time they get it to meet standards it looks like a tundra... Well, sure it could be styled different. There is no reason though you can't have something like that custom built for a tundra though, all it takes is money. I think they call it an earthromer when it is done on a ford...
Anyways I'll be driving the companies 70 series's again in a few days. They are nice, but it might as well be an 1980's US truck with how it drives, rides, and comfort amenities...