This one seems to have a lot of positive Reviews on Amazon Japan:
https://www.amazon.co.jp/【国内正規代理店品】...8-2-fkmr0&keywords=usb-c+ethernet+displayport
This one Looks promising but it's just getting available
https://www.amazon.co.uk/ProLink-ad...&qid=1477833754&sr=8-1&keywords=prolink+usb-c
Gosh, it seems to really hard to deliver a Quality product.
https://www.amazon.co.jp/【国内正規代理店品】...8-2-fkmr0&keywords=usb-c+ethernet+displayport
This one Looks promising but it's just getting available
https://www.amazon.co.uk/ProLink-ad...&qid=1477833754&sr=8-1&keywords=prolink+usb-c
Gosh, it seems to really hard to deliver a Quality product.