Staudacher was a very well known name in Gottschee, a German enclave founded in about 1330, and which was part of the Austro-Hungarian Empire until WWI. It was located in the southern tip of Slovenia. The enclave was established by the emperor to protect the underbelly from attacks by the Turks.Gottschee came to an end in 1941 when Hitler withdrew the Germans from the area to closer to Austria, again to protect the underbelly, this time against the Yugoslav partisans and because he had turned over that area of land to the Italians.
Over the years, from Gottschee, a lot of Gottscheers settled in Milwaukee and there used to be a large organization of Gottscheers there that held a gathering about every four years.
Checking with the Milwaukee newspapers' archives might lead you to one of the leaders (if nothing is listed in the phone book under Gottschee) who might be of help to you in your searc.