Well - I checked again this morning for the particular flight. It's been on ANA for at least two days and is still there for both Econ and Bus class.
I phoned the ICC and they had no availability showing for either class.
I am concerned that as this is the last bit of an LAX-ORD-FRA-DUB if I don't snap up the other parts I will lose them. The ORD-FRA only has availability for 11th September. I fear that I may be forced to end the trip in FRA and pay for the LH4982 FRA-DUB Econ flight, in effect costing me about £100 each and not being a connecting flight in the event of a delay.