Dear __________,

We regret to inform you that due to new restrictions enforced through FAA regulations on transportation of goods, we will not be able to complete this transaction and ship out your order, as it is for an item which falls into the dangerous goods category and is prohibited for international shipping.

As these restrictions have just recently been placed, we had no prior knowledge of them. 

Had we known, we would not have sold this item for overseas customers in the first place.

We apologize for the inconvenience this may cause you and thank you for your understanding.

Truly yours,