Outside of Dangerous things control unfortunately.
Have you found any shipping alternatives they could look at?
I’m in NZ so shipping is similarly priced.
What I have used before is an international “Freight Forwarder”
One called myus.com (based in florida)
they provide a US shipping address, so you would just have your parcel sent there, and they on forward it to you, for a fee, this is calculated by weight.
You pay the base fee, which covers the first 500g, and anything over, you pay per 500g a DT package, should be <500g.
SO you would pay DT the local postage, or, it may be free shipping depending on what you purchase, then the myus.com postage fee, so it could well be a cheaper option for you.
here’s an indication ( for a 300g package )
MyUs.com, I have always recieved my parcel, but i wouldn’t say it was my favourte company to deal with. But it works.
There are other options out there, so shop around.
NZ Post also offer a similar service, so i’m guessing AusPost may well do the same.
Similar service provided, but better to deal with and similar pricing.
I know a somebody in the USA and I get things sent to her on occasion, she on sends it to me. So if you know anybody in the US of A that could be an option for you.
I hope this helps
otherwise