For Polish windows, you can contact
www.city-country. se
They probably only have plastic at the moment, but they look very good and have a better k (u)-value than wooden windows. In addition, they make them to order, and that's how most things with windows work in Poland, so if you don't want to travel back and forth with the outrageously expensive ferry, you'll "save" by shopping and ordering in Sweden. Plus, IF there are incorrect measurements, there's a solution that doesn't involve taking a boat!!
