HBG has expansion sets for every power. I got a set for Germany and one for UK, and some extra chips including green ones to represent 3 units, and i haven’t had any issues.
One could get a rules download, get different colored pieces that look similar from other AAA games and hand them out as tryout games to newbies with excellent map, piece containers, game box and odd looking but functional pieces. If one is feeling benevolent, throw in some dice. :)
