Now if you are just going to go with a tub then you would really only need to do the back half of the floor. You can easily make it yourself if you have the patience and time for it. I dont see why you would have to redo the whole floor just for a tub. I got a 1993 Mustang GT hatch that has a tub and the only part of the floor that was redone was the back half behind the front seat. I am going to be redoing it to clean it up better.