i would imagine, the first thing you'd need is a sh!t load of money. then, a person/company capable of making one off things, like the seats, etc. I would imagine with the exception of a few things, most of the differences are copyable.
thanks thats about what i figured. i was just checking. it would be cool to do but idk about pouring that much money into my fj cruiser plus i don't have the money right now seeing as i'm a senior in high school but thanks for the replies. to bad they destroy concepts