nvidia dgx spark?
also, system76 has one: https://system76.com/desktops/thelio-astra-a1.1-n1/configure
also, dell: https://www.dell.com/en-us/shop/desktop-computers/dell-pro-m...
HP is coming soon, will be called `ZGX Nano AI Station` apparently
Also lenovo: https://www.lenovo.com/us/en/p/workstations/thinkstation-p-s...