I’ve bought all of the country-themed expansions except the one for Turkey, which is currently sold out.
I’ve also purchased many after-market pieces from HBG, FMG (the Italians), and Airfix.
I find that the rules for the G1936 game are clunky and that, while the map is gorgeous, territory distribution doesn’t suit the vision I have for a modified game. I’m trying to figure out how to print an alternative map for that reason.
I think the next expansion HBG offers should be focused on South America, providing pieces for Argentina, Brazil, and Chile. Perhaps something titled “Under the Southern Cross.”