Imperx VCE-HDEX01 HD-SDI Express Card 54 Video Capture Card
ExpressCard - Wikipedia
Amazon.com: JMT 3 Ports Hidden Inside USB 3.0 to Expresscard 54mm USB3.0 Adapter Converter for Express Card Laptop Notebook PC : Electronics
PC cards, CardBus and Expresscard slots - Computer Essentials Winter 2015
Amazon.com: StarTech.com 2 Port Flush Mount ExpressCard 54mm SuperSpeed USB 3.0 Card Adapter with UASP - Dual Port Laptop ExpressCard USB 3 Controller (ECUSB3S254F) : Electronics
Amazon.com: JMT 2 Dual Ports USB 3.0 HUB Express Card ExpressCard 54mm Hidden Adapter Converter USB3.0 for PCMCIA Laptop PC : Electronics
expresscard 54 - Newegg.com
Amazon.com: JMT 3 Ports Hidden Inside USB 3.0 to Expresscard 54mm USB3.0 Adapter Converter for Express Card Laptop Notebook PC : Electronics
Finally got the cheapest USB 3.0 Express Card for my T420 😁 : r/thinkpad