I wouldn't hold your breath waiting for that one. There's still no official announcement about the route, and I suspect they will wait until they have more than one 744LR on active service before they commence that route.

To get here prior to xmas and depart after (a challenge this close to the date, as this time is quite popular), they might try the CX routing advised above, or arriving in Australia via MEL or BNE.

Another option would be to get a OW around the world award ticket, going via JFL-LHR-SIN or BKK to Australia, then back home through the east coast to LAX.

Probably won't cost much more in terms of points if they're flying J or F.