Amazon.com: Plugable 2.5G USB C and USB to Ethernet Adapter, 2-in-1 Adapter Compatible with USB-C Thunderbolt 3 or USB 3.0, USB-C to RJ45 2.5 Gigabit LAN Ethernet, Compatible with Mac and Windows :
USB-C to USB 3 Female Adapter
What's the Difference Between Thunderbolt 3 and USB-C?
Thunderbolt 3 Cable 2m 20Gbps White - Thunderbolt 3 Cables and Adapters | StarTech.com