StarTech.com TBT3TBTADAP Thunderbolt 3 to Thunderbolt 2 Adapter - Backward Compatible - USB C to Mini DisplayPort - USB-C to Thunderbolt 2 Thunderbolt Cables & Adapters - Newegg.com
Thunderbolt 2 To Usb 3 - azgardmixer
Mac and MacBook Ports: Thunderbolt to USB and other adapters you need | Macworld
Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter - SmarThingx