Yes, Joker Greeting does have some retail partners in other countries. See below for a list of partners. This way you can save on shipping and duties! 

Australia

Spicy Baboon  has a variety of Joker Greeting items

Austria 

Radbag.com 

U.K.

Firebox.com - They carry a few Joker Greeting Items

Grand Illusions 

Netherlands

AB Vitality - Christmas Card

AB Vitality - Birthday Cards

Paris

L'avant Gardiste (they only carry the Birthday Card)