US Amazon 16GB: https://www.amazon.com/dp/B0BFFGRGLZ
US Amazon 32GB: https://www.amazon.com/dp/B0BFFGLQ3Y
Don't ask me any questions though. I'm not from the US and I've ordered mine from IGG lol.
UK users can get it here: https://droix.co.uk/product/gpd-win-max-2-gaming-ultrabook/
EU users can get it here: https://droix.net/product/gpd-win-max-2/