The entire procedure is difficult. Two companies that do export are http://www.handcuffwarehouse.com/
One of them might be willing to furnish you the specifics you require. Contact email@example.com
. For a fee, Orchid possibly will send the cuffs for you.
As an aside, I don't recommend disregarding the law and mailing them on your own. Although you well may get away with it, the penalties -- fine, imprisonment or both -- if you get caught are severe, not to mention tens of thousands of dollars in attorney's fees.