Amazon.com: Inateck 2 Port PCIe USB 3.0 Card with Internal USB 3.0 20-Pin Connector - Expand Another Two USB 3.0 Ports, Compatible Mac Pro, No Additional Power Connection Needed : Electronics
1pcs Edge Card Connector Slot 3.96 Mm Pitch 40/44/56/60/86/100 Pin Pcb Gold Finger Socket Through Holes - Connectors - AliExpress
Uncommitted Backplane, 96-Pin, 160-Pin DIN | Vector Electronics