You'll be better off with a good upholster doing it anyway. My interior guy does not like the carpet sets that customers obtained from the catalog companies. He can make better product for the same money anyway.
Something to consider- you could have your guy make a 2 way carpet with a vinyl or rubber backing much like a modern SUV has. Look at an Envoy or Trailblazer. It has close-pile carpet on one side and cleanable vinyl on the other. If you had rubber on one side and carpet on the other, you can flip them depending on what you need. Of course you'll have the seat mount holes to consider but you could have multiple pieces made to not make it such a hassle to flip carpets or remove seats. Just a thought.
