https://www.amazon.com/SUNIX-USB-C-Express-Alternate-Mode-UPD2018/dp/B01MY4WRBU this is the card and it works well most of the time(typing this on the dock)
You need this https://www.amazon.com/SUNIX-USB-C-Express-Alternate-Mode-UPD2018/dp/B01MY4WRBU?ref_=d6k_applink_bb_marketplace