I can add that last February I sold 15x Acros-135 to a Romanian APUG'er. He was a bit concerned that Romanian customs would x-ray the package and fog the film. Eventually he (we) took the chance and it worked out fine.
I believe (but I have no data to back this up) that only a very small fraction of parcels and letters is checked by whichever means (by hand, x-ray, dogs, etc.). Too many shipments, too little time and personnel.
I would take the chance if I were you.