I see two for sale here in Japan, one for 1000yen the other for 2000yen.
I could ship one to you. I also have the matching audio oscillator on my shelf if you want that.

(there was a whole set of matching test gear available, it pops up here in Japan from time to time).
Not sure if you can see it from Australia:
https://auctions.yahoo.co.jp/search/search?p=CO-1303DI'll be back in Brisbane and Adelaide over christmas too, failing postage and if I have space in my luggage.
You'd have to check the mains voltage thing though, I don't know if they are voltage selectable with a switch or wire links on the transformer etc.