Looking for Kaisers from Alsace Lorraine

My great-great-granfather, Carl August Christian Kaiser emigrated to Adelaide South Australia c1846. One of two brothers he emigrated to Australia and his occupation on his marriage certificate is listed as gardener and mason.His brother emigrated to America, where he became a boat builder.

Carl married Maria(Mary)Elizabeth Catherina Depenbrock on 30/09/1851 in the Klemzig Lutheran Church,Adelaide, South Australia. I have some information relating to their descendants but know nothing about their lives prior to emigration.