ThinkMods ExpressCard to NVME adapter - unboxing and OS install - YouTube
eGPU with a Thinkpad x220 from 2011
PCI Express Card to USB 3.0 2 Port Adapter 34 mm Express Card Convert_f6
Amazon.com: JMT 3 Ports Hidden Inside USB 3.0 to Expresscard 54mm USB3.0 Adapter Converter for Express Card Laptop Notebook PC : Electronics
USB 3.0 54mm 3 Port Express Card Adapter Expresscard for Laptop FL1100 Chip
My pimped to the max X220 I'm selling soon. 16GB ram, modified bios without wifi card whitelist and Hackintosh compatible wifi card, msata ssd, expresscard USB 3.0 adapter : r/thinkpad
New Genuine Reader Card Bracket For Lenovo Thinkpad X220 X230 Expresscard Slot 04w6738 - Pc Hardware Cables & Adapters - AliExpress
Removal steps of system board and ExpressCard slot assembly - ThinkPad X220 Tablet and X220i Tablet - Lenovo Support US