LSC New Original For Lenovo ThinkPad X1 Carbon X380 YOGA L380 L390 RJ45 Ethernet Extension Cable 04X6435 5C10Y97178 - AliExpress
FRU04X6435, Lenovo ThinkPad Ethernet Expansion Cable, RJ-45, 18 cm for ThinkPad X1 Carbon | EET
New Original For Lenovo ThinkPad X1 Carbon Ethernet Extension Cable Adapter RJ45 4X90F84315/04X6435 4X90Q84427/01YU0261 From Miyuefang, $48.92 | DHgate.Com
04X6435 Lenovo Ethernet Extension Cable for ThinkPad X1 Carbon