Originally Posted by
ademanuele
Thanks for this. I changed the POS and is showing availability of D. I have BA, QR, QF AA, UL and JL in my itinerary plus another CX flight that seems to be accepted.
I guess I am going to have to use a travel agent...

That's just the fares page. You need to check the Flight Availability page. You'll need D to be more than D0 with the correct POS. It looks like this:
On that route especially it's useful to click the Exclude Codeshares button to find availability, it seems to like to favor the NZ metal codeshare for some reason.