I'd be waiting 6 weeks until the leftover J come out for early Oct for NB status....
Best bet will probably be LAX-BNE-ADL or SFO-SYD-ADL, DFW-SYD is slightly less likely in my experience.
Try CX SFO-HKG-ADL/SYD or LAX-HKG-ADL/SYD as well (use multistep to bring up these 2 legs, might need a stopover 24hrs in HKG)
thanks cjd600, appreciate your assistance