I managed to acquire an ex NZ L2A1 last year, to my knowledge its the only privately owned example in the UKicon, I have certainly never seen or heard of any other examples of the fully spec'd Australianicon/NZ L2A1 with the top cover mounted back sight and blanking plate in private ownership.

I can only surmise that a number of them passed through the UK (as the bulk of the NZ L1's did) after being sold into the arms trade and my example was pulled aside and deactivated for some reason.

She's certainly the queen of my Inch pattern collection and by far the rarest of the breed with only a few hundred examples being supplied to NZ.

Long since given up on acquiring a C1 derivative.

A C1A1 backsight ( kindly supplied by Jim) will likely be as close as I get!