How to purchase a movıe only avaılable outsıde your country

Hı there,

ı currently resıde ın Turkey,but the movıe ı wısh to purchase ıs NOT avaılable there.

but ıt ıs avaılable ın The U.S and U.K ıtunes stores.

My questıon thus ıs thıs :

How can ı purchase ıt from the U.S or U.K ıtunes stores ?

Thank you