We can install a frameless 8mm hinged glass door inside your existing door so you don't need to replace it. Then, between the new inner door and the existing door you place any venetian of your choice. This photo is an example with shutter blinds inside a double glazed window by Euroglazing in Sydney. ...

I don't recall seeing it but there are hundreds on Temple and Webster.

If you look on eBay, leisure coast garden centre, Fairy Meadow nsw , type in large garden pots , they have a really good range and at such good prices and they have similar to what you are after. Good luck

Have you made contact with the company Grant to see if they have alternative stockists in Australia or if they would consider shipping to Australia for you? You could also arrange for a freight forwarder in the US to ship it to you here but not sure what sort of mark up that will be in addition to your product+shipping? If you know a carpenter or woodworker, maybe take the design to them & see if it’s possible for them to make you an original? Your local markets may have a local timber feller that might be happy to give it a go? I love this piece so would love to hear the outcome :)