The same (or similar) fake devices are almost certainly still available in Australia, and can probably be picked simply by the price - I have heard AU$2.50 mentioned for small quantities. Since you can't buy the devices from ON-Semi for that, any MJL21193/4 offered for such a paltry sum is almost certainly counterfeit.
http://sound.westhost.com/fake/counterfeit-p3.htm
http://sound.westhost.com/counterfeit.htm
Photo of the Counterfeit 'Motorola' MJL21194 (May Also Be Branded ON ! )
http://sound.westhost.com/fake/counterfeit-p3.htm
http://sound.westhost.com/counterfeit.htm
Photo of the Counterfeit 'Motorola' MJL21194 (May Also Be Branded ON ! )