This paperweight is by Marc Kalifa of Maleny in Queensland, in the Sunshine Coast hinterland about 95km north of Brisbane. See the image of a similar weight below (four years earlier than the weight in question, so not surprisingly a little less developed) and the signature from a different item, showing the numbering scheme.
The original poster is located in Australia it seems, thus making an Australian source that more likely.
I've just smashed my new personal best record, set only a couple of hours ago. This solution is being posted 6 years and 66 days after the original query!