European Candy – Knoppers?

I’ve found the company’s website, but there isn’t a way to buy them. This company also makes Werther’s Original and Riesen chocolate chews

From the website – Knoppers is a milk and hazelnut square with wholesome ingredients: crispy-backed wafer with one third whole-wheat flour, delicious milk and melted nougat cream filling and refined with crunchy roasted hazelnuts.

Has anyone in the US ever had this awesome candy? Are there any places that might sell them in the US? Or, is there a way to buy them on the internet somewhere that I can’t find?