I was looking a little more carefully at these pictures, and those are not Australian market tails. That is a garnish from either an S401 or a 2003 Blitzen sedan. Those were the only models worldwide that had a tinted tails with the word "SUBARU".

First, Australian tails are not tinted, and they also have the tell-tale rear fog lights in them, just like the European tails. They are the lighter colored squares on either side of the "Subaru" in this picture:
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So, the tails that you have are exceedingly rare, less than 500 ever made.. probably closer to 400.