if you have a handful of other important user details that pertain to the user of the account your trying to access, could you try to avoid this by contacting them and saying something along the lines of "hi, i have trouble accessing account and no longer have access to the card that i am being asked to verify.. please help.. etc" youd be surprised what you can get away with simply just contacting establishments and acting like a normal human.. we are all human, we all make mistakes, we all forget, we all need access to our account at some point in life and need assistance of other human. try it. because i just tried looking it up for you and there are hundreds of amex gold bins in AU according to multiple binlists