Something like this?Would someone design a flag for a Silesian state in Patagonia? It is a "republic of the nobility" where nobles, aristocrats, and clergymen mainly run the country, with a token elected legislature with little power. The nation has extensive cultural influences from Poland and Bohemia due to the high immigration from those two areas, though immigration and influences from various slavic groups exist.
Shield of Upper Silesia bearing a shield of Henry the Bearded (since Lower Silesia itself held as being too colonial?)
Field of red & white stripes in the colours of Bohemia and Poland but reinterpreted for the local nobility?