There are some restrictions regarding import of plants to Iceland. A health certificate is needed when buying plants from any other country for resale. But people are allowed to take with them a couple of plants for their own personal use and I see in the regulations that the same goes for sending a small plant in the mail.
Seeds and bulbs can be sent freely and I have received small seedlings in the mail without any trouble.
I received Sempervium seeds from Jonna Sudenius in Belgium and I´m very excited about what will germinate. I don´t have any semps in my garden but I have some Saxifragas and sedums, my favorit is Saxifraga cotyledon, which is a native plant, but it is rare and grows in the south-east part of the Iceland in cliffs high in the mountains below the huge glacier Vatnajokull.
I think the succulents you grow in the US and Canada are so beautiful and you I love how you display them in all kinds of containers.