If you only want to change the seat covers, just contact ACC or one of the other high quality seat cover suppliers for the necessary items to switch over.
You don't necessarily have to change door panels unless you want to.
Tom's right .... the seat covers and the seat pads are different, and you might want to change the rear seat at the same time - so they match - but the door panel change would only be if you are looking to change the entire interior to the deluxe style, in which case you'd also need to change your instrument panel to Burlwood.