40+ USB-C hubs with 2 or more USB-C downstream ports – Dan S. Charlton
Tech Talk: Using USB-C and DisplayPort over Alt Mode
4K 60Hz USB-C to DisplayPort 1.2 Cable
Cable Matters USB C to DisplayPort Cable (USB-C to DisplayPort Cable/USB C to DP Cable) Supports 4K 60Hz Black 62 Inch - Thunderbolt 3 Port Compatible for MacBook Pro, Dell XPS 13/15
Unitek V1411A USB Type-C to DisplayPort 4K Adaptor - GeeWiz
display - What do the upstream/downstream USB ports on a monitor do? - Super User
USB-A vs USB-C: Comparing Different USB Types On Monitors - RTINGS.com
USB Type C, mDP & DisplayPort to HDMI 18G Converter Tether - from LINDY UK
Product | StarTech.com 6ft (2m) USB C to DisplayPort 1.2 Cable 4K 60Hz, Bidirectional DP to USB-C or USB-C to DP Reversible Video Adapter Cable, HBR2/HDR, USB Type C / Thunderbolt 3