Sorry, I only just saw this! Cable Matters: https://www.cablematters.com/pc-1278-154-vesa-certified-displayport-14-cable-18m.aspx https://www.cablematters.com/

Sorry, I only just saw this! Cable Matters: https://www.cablematters.com/pc-1278-154-vesa-certified-displayport-14-cable-18m.aspx https://www.cablematters.com/pc-1278-154-vesa-certified-disp... plus this adapter: https://www.cablematters.com/pc-1038-122-usb-c-to-displayport-adapter-8k-ready.aspx https://www.cablematters.com/pc-1038-122-usb-c-to-displaypor... I'm using these 2 items to get 4K @ 120Hz on my Acer screen, from my intel macbook.