I want to buy a tailored boot liner/tray for my new A3 Sportback. Audi sell them, but almost identical ones are available elsewhere that are cheaper. Some suppliers sell two different types for the A3 Sportback - one for cars from 2004 to 2008, and another for cars made after 2008. However, other supplies just list one type for Sportbacks from 2004 onwards. Is the boot in earlier Sportbacks somehow different in size/shape to the more recent cars??