The Oculus Link cable is sold out at Oculus.com but you can still order it here.
The Oculus Link cable is the official cable that enables you to use the Oculus Quest to connect to a VR-ready PC to play Oculus Rift games. Only high quality USB Type C cables work. The official Oculus Link cable is a 16-foot long, high speed fiber optic USB Type C cable that will ensure optimum performance.
The cable is out of stock at Oculus.com, but you can
order it here from Amazon (4 week delivery). Please note your PC must have a GTX 1070 or better graphics card to be able to use Oculus Link.