PCI Express to USB 3.0 Dual 2 Ports PCI-E Express Card Adapter for NEC 34MM Slot ExpressCard Converter 5Gbps PCMCIA Laptop PC - AliExpress
StarTech 2-Port ExpressCard 54mm USB 3.0 Card Adapter
No ExpressCard slot, no problem - Terry White's Tech Blog
StarTech.com 1 Port Flush Mount ExpressCard SuperSpeed USB 3.0 Card Adapter with UASP Support Add a USB 3.0 port connection that inserts flush into a laptop ExpressCard slot slim usb 3.0 expresscard - Office Depot
HDMI ExpressCard HD Video Capture Card - Video Converters | | StarTech.com
2 Ports USB 3.0 5Gbps PCI 54mm Slot Express Card for Laptop / Notebook
Ports and Slots in Laptops | Tech Explainer
Dell laptop's ExpressCard slot comes with a ruler and list of unit conversions (xpost /r/mildlyclever) : r/pics
2 Port ExpressCard USB 3.0 Card Adapter - USB 3.0 Cards | Add-on Cards & Peripherals | StarTech.com