US cake mixes in Europe?

I use Duncan Hines and Betty Crocker cake mixes in recipes for a lot of cakes and cookies.

Iceland (the shop, not the country) used to carry a lot of them over the last 10 years, but when I went last week, the only US mix was a gluten-free chocolate cake mix, and it doesn't look like they are planning to re-stock.

Has anyone found a store (local or online) that sells US mixes?

I suspect it's probably just time to learn new ways to bake, or to skip it and save the calories.