Air China has a few 2 class 77w with 10 abreast in economy class. They fly them to Sydney or Vancouver depending on season. Most of the fleet are 9 abreast and there is no plan for refit.
https://www.routesonline.com/news/38/airlineroute/273567/air-china-w17-international-service-changes-as-of-29jun17/