I just found a great aunt after a year of searching. I could not find anything at Yad VShem, US Holocaust Museum, Jewish Gen, etc., etc., etc. My lucky break happened last week. I submitted a records search request at the Arolsen archives. I couldn't answer everything they asked for but I gave them every bit of information I had which was not much. I now have 50 pages of documentation including her testimony taken after she moved to Israel in 1948.