Dear Sean,
What do you know about the "Huonder oils"? Exactly what has happened to them, who is using them, where are they being used, and for which Sacraments? (Do they have radioactive isotopes included for tracking purposes?)
Its a bit of a mystery, because as you intimate, there's no way of really knowing for sure where all those oils went.
I know that in the immediate aftermath, some German District priests arranged to obtain oils variously from both Econe and from Bishop Faure.
That leads me to believe that those oils were probably destined for German speaking locales, but of course those priests travel, and still other priests visit the German District, so no way of knowing precisely where all those oils ended up.
PS: Hopefully, it is just a temporary problem, because holy oils do go rancid in a couple years, and they must either be consumed before then, or reverently disposed of. So presuming there is no Huonder repeat, the problem will correct itself in a couple years, as those oils are taken out of circulation.