The Texas Military Forces Museum used to maintain an exhibit dedicated to the Lost Battalion. They continue to maintain a website with relevant information
http://www.texasmilitaryforcesmuseum.org/36division/archives/lostbat/lostbat.htm
http://www.texasmilitaryforcesmuseum.org/lostbattalion/index.htm
http://www.texasmilitaryforcesmuseum.org/lostbattalion/history.htm