[macman]

The sound deadening mat/block (whatever you want to call it) in the drivers footwell isn't part of the carpet, it's separate - well, neither of mine were glued together anyway.

I doubt an automotive carpet supplier would have one to suit the AU, but they may have a generic sound deadening/underlay material that could be used in place. But as the original was moulded to the shape of the floorpan, I'd recommend sourcing a nice clean one from a wreck.

As for the best carpet, I would be chasing a VGC plush carpet set from a Fairmont or Fairmont Ghia in the appropriate colour (not Fairlane) as opposed to the standard Falcon (or Falcon XR) carpet.