Sorry for your disappointment! I can't speak to that part of Czechia as my ancestors came from Moravia. When I first visited Czech relatives in 1991 (Czechoslovakia at that time), we were served fruit kolaches that looked just like the ones my grandmother had grown up with in Texas, although the Moravian ones were smaller. However, I've been back to visit my 3rd cousins multiple times and I get the impression that the specific pastry that Czech Texans are so familiar with is just one of many kinds in the old country. In the 1800s, ovens were not as plentiful in Europe, but were more common in America. Sugar, butter, eggs and white flour were more expensive in Europe, so kolaches were reserved for special occasions. But since it was easier to make them in America, Czech immigrants made them frequently and they became one of the most prominent symbols of Czech culture.