google said this:
http://www.alpinaaustralia.com.au/main.htm
"Alpina Bavarian Motorsport Production BMWs in Australia, since 1984, have been and are built /produced using only BMW Australia's Imported fleet of Right Hand Drive standard Australian Compliance plated BMWs.
LHD BMWs are not possible in Australia and thus Alpina Bavarian Motorsport RHD production chassis numbers are not related to ALPINA Gmbh's production fleet"