It's a shame the Perth Mint doesn't sell this series to Australian customers. https://www.lpm.hk/2021-1-oz-tuvalu-gods-of-olympus-poseidon-9999-silver-coin-bu.html
I understand your frustration. I'm an authorized dealer for Perth and even I have to go through LPM for this one. This is their private commission and they own the rights to the distribution for the entire mintage.