Hi Wendy , Houzz is a design site -- I don't think they sell products . You'd need to find out who in the US was selling this design , and then either contact them , or find if there is an Aus retailer ( or wherever you are ) . Maybe that's the intention of your post ?
https://www.fabricmill.com/coral-reef-oceanside.html. On their site there is no mention of shipping os, they use UPS. UPS ships to Australia. I suggest emailing or ringing. I have got fabric from Fabric.com. Great service, 7 days to Qld pre-Covic. Be aware that it is usually multiples of US price for us.
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That night that I ate blueberry squares in bed , I ended up with a similar pattern . . . . . . . .