Hasegawa has announced two releases of their Boeing 777-300ER kit, both of which should be available shortly.  The kit features the extended and raked winglets, and GE90 engines.

First announced, and should be here first, the kit HAS-10718 with All Nippon Airways markings.

Hot in its jet exhaust should be HAS-10719 with Japan Airlines markings.

The wings, with their extended and raked wingtips and GE90 engines are interchangeable with a 777-200 fuselage, allowing an accurate -200F or -200LR to be modelled.   Decals are already available by DRAW Decal in particular for the -200F (FedEx, DHL, Thai Cargo).

I am accepting pre-orders for both kits, they will be shipped as soon as they are available.