Sorry to hear about your ZED issues. looking at the pass rider list from SYD are you initials AHK?
I was going to mention ANA as they fly to SJC but not everyday, I did not see ANA as a ZED option on skynet.
I have not used the eZED's yet. Last time I needed a ZED it was still a paper ticket.
But, I did not make a US Airways flight once as the gate agent did not know how I flew with them (NO ZED, regular listing like a US Airways employee) but gate agent would not let me check in as I did not have a coupon.