I have a Corsair 750D case, and I see that the USB-C front I/O panel is out of stock on the US Corsair site:
https://www.corsair.com/us/en/Categories/Products/Accessories-|-Parts/Obsidian-Series-750D-USB-3-1-Type-C-I-O-Panel-Upgrade-Kit/p/CC-8900138
It seems to be available on the UK and EU sites, though the site will only allow shipping to the UK / Europe:
https://www.corsair.com/uk/en//Categories/Products/Accessories-|-Parts/Obsidian-Series-750D-USB-3-1-Type-C-I-O-Panel-Upgrade-Kit/p/CC-8900138
https://www.corsair.com/eu/en//Categories/Products/Accessories-|-Parts/Obsidian-Series-750D-USB-3-1-Type-C-I-O-Panel-Upgrade-Kit/p/CC-8900138
It seems available in some other countries too, but the site only allows shipping to those countries. Where can I buy one in the US?