Hello Garry,
I just copied Kincrome 19mm 1/2" Drive Hex Bit Socket and pasted it into eBay and multiple Australian suppliers were shown. The eBay suppliers seem to be higher in price than what Bunnings are currently advertising.
Some special orders at Bunnings can take a matter of days - up to a couple of weeks. It would be worthwhile investigating the possibility. It depends upon the amount of hurry involved.
If you do the cut and paste into Amazon - a retailer has two currently in stock for only $20. Hurry and you might be able to snaffle one! The one shown on Amazon's page looks like it has a shorter shank though.
Kind regards
Lionel

