Amazon.com: StarTech.com 1 Port Flush Mount ExpressCard SuperSpeed USB 3.0 Card Adapter with UASP Support - ExpressCard USB 3.0 Adapter (ECUSB3S11), Green : Electronics
SilverStone M.2 to PCI-E Express Card x4 Expansion Card LN95710 - SST-ECM25-V2 | SCAN UK
Fun use for empty expresscard slot in T430 : r/thinkpad
M.2 (NGFF) NVMe SSD to Laptop ExpressCard 34. e.g. for Samsung 950/960/970 EVO #19499 | M-Ware
Sonnet M.2 2x4 Low-profile PCIe Card – Sonnet Online Store
USB 3 PCI Express Card Adapter for 54mm Slot of Laptops - YouTube
Transcend TS16GSSD34E: SSD ExpressCard for those on the Go...