Sorry, silly question time ..
Searched a few threads on here which appear to answer part of my question. I have the 'luxury' Alfa mats in my car (dealer reluctantly fitted them as part of the deal) but the fit is appalling. It seems that the rear profile of the cars changed 2007/2008 which explains why my mats are too big and look awful. Looks like I have the early model mats in a later car.
The other issue is the fixings. Mine came without any (but seems that VW do a good fixing kit that will fit) but the car has (factory fitted) those ridiculous pins in the carpet front and rear, obviously for mats.
Unfortunately, Alfa dealers are unable to supply any mats that fit these pins!! WTF??
Apparently the factory fit them to all models now, and if you're lucky the car comes with mats that fit them, if it doesn't (or you buy a used car) tough, and you can't get replacements.
My best option it seems is to buy a new set of mats (the right ones for my car) at a silly price (or get some tailored to fit) and somehow remove the original, useless factory mat fittings