If the insert isn't broken you can glue it back on with some gs hypo cement.use only a few small drops on the outer edge of the bezel and keep glue away from crystal or you run the risk of glueing the bezel to the crystal which will make it hard to turn.don't use super glue as this will bugger your watch .contact glue will also work.hope this helps mate
You could also go to the parnis watch site.they sell ceramic inserts for $25 including shipping.I'm told the noob reps use these inserts in their watch builds.Trevor can also supply them
Looking closer at the photos you can see what might be glue at the bottom of the pearl and to the top left of the triangle.could well be after market insert.
A good remedy is to put the strap in a bag of baking soda.leave it there for a day Or so and it soaks out that shitty smell.worked for me and is especially good with leather
Customs would still say if they had confiscated it.maybe you should contact them to confirm.I can't see them sending you an empty box with no explanation .I feel for you mate but I would contact customs to put my mind at ease.when I send stuff I put watch for repair or repaired watch on the customs dec.they xray it so no point saying it's not a watch .got this tip of a us seller after I got caught out once and have had no prob since.I hope you guys can sought this out
If customs had taken it they would have put a note in the box saying that.its happened to me .if they thought it was gen they would have their hand out for the money, as there would be no reason to assume it as fake?