I thought Nestle made them so I decided to google it, you can get them in hotel mini bars at Olivers Hill apart from there it seems that you can only get them in show bags now.
There is a shop in Carlton in Melbourne that import lollies and chocolates from all over the world, I used to buy things in there that I hadn't seen since I was a kid.
Damn diabetes, now I want a Bertie Beetle!!