Most Tandy shops will cut a blank off a side for you (so you don't have to purchase the whole side and do your own cutting). It's best to do that in person, although you could probably talk them through it on the phone or by email. Is there anyone you'd trust to represent you who lives near a Tandy?

A lot of US stores don't want to ship overseas - some Tandy dealers among them - only because the paperwork is a pain, not because the goods themselves are verboten. Some won't even ship to an APO/FPO for that reason. So if you had someone here do the legwork and mail it for you, that might be the best way to go.