My suggestion, assuming you don't need embroidery, is:
1 - choose your carpet material / colour from one of the car carpet suppliers and buy what you need off the roll
2 - make up templates in cardboard or similar
3 - cut out your shapes
4 - find your local carpet shop that can do edge binding and get them to do it
I did that with my Fulvia, after having a botched job from a car mat retailer that seemed incapable of making to measure despite their claiming that they could do so.