Amazon.com: ELEDIY 2 x 20(40 Pin) Stacking Header for Raspberry Pi A+/B+/Pi 2/Pi 3 Extra Tall Header (Pack of 4) : Electronics
Amazon.com: 2 x 20 (40 Pin) Extra Tall Female 0.1 Inch Pitch Stacking Header Compatible with Raspberry Pi A+/B+/Pi 2/Pi 3 Extra Tall Header (Pack of 8) : Electronics
2 PCS USB 3.0 TYPE A Receptacle female connector Stack 18 Pins 2 Ports Right Angle Cross 0484060003 1003 004 01010 GSB311231HR|Connectors| - AliExpress
Buy Wholesale China 2.54mm Stack Plastic Pin Header Connector Straight Type 3 Rows & 2.54mm Stack Plastic Pin Header at USD 0.2 | Global Sources
HO scale Modeltronics 1340 Sub-Mini Connector 2-pin Stack Talk Sound NOS | eBay