Their website is on the back of the box: www.northatlanticbooks.com
If you get no response you could contact Patricia Cori, there is a contact link on the Sirian Starseed Tarot homepage http://www.sirianstarseedtarot.com/Home/index_home.
I just sent an email. The Patricia Cori link doesn't work, but I emailed northatlanticbooks.
Let's hope I get a response..