Even just a card with a SATA port would do. But all I'm finding when I search turn out to be mSATA cards. But maybe I'm not searching for the right thing (or maybe it doesn't exist after all). Quote ...

Home > Computing MSI Shows Off Hot-Swappable PCI Gen 5 SSD Card That Resembles a GPU The company's new M.2 Xpander-Aero Slider Gen 5 lets you easily swap SSDs from the back of your PC.