We can't give links or promote episode locations on this wiki, so you'll have to look elsewhere to find the episodes. However, I know that "The Befana" and "Robostus" haven't been released in English in any country yet.
I'm sorry, but this wiki doesn't allow illegal source sharing, either for places or links, because we want to support official releases for the show. However, you can ask people outside of this wiki or search around for them. This isn't the place to give sources for episodes if they can't be watched official, however.