I figured out what I did to order in the US lol.
- Open a new private window
- Copy and paste this link
- Change Shipping, region, and currency to Australia
- Scroll down to the listing and click “Preorder Now”
- Add the desired amount and click “Preorder Now”
- Close the pop up window
- Login to your AUS account Using Account>Login
- Use the back arrow to navigate back to the page originally linked (Star Wars Blu-ray page)
- Change Shipping, region, and currency back to US (your cart will show 0)
- Login to your US account Using Account>Login
- They should now be in your cart
Let me know if this works. I have gone through it 3x and have been successful each time. (used Safari 13.1)