Not a country costume, but Chrisanne currently has a curious ballgown on their US website in what I would guess you might call a calico print - size 8-10 section, a few lines down on the lefthand side. Not really my idea of a ballroom costume either, but unique at least. (they call it 175R RTW LUP 10)
Eww! Hated it! The style itself isn't all that bad, but the fabric I don't care for. Have they recently updated the Chrisanne USA site? The last time I remember going to Chrisanne, they didn't have all those nice styles pictured.(Either that, or I somehow missed the show.) A very nice site, for style shoppers, indeed. 8)