I am also descended from this line through a sister to Edward, Barbara. I have only recently discovered that the government of France has made provisions for many provincial and parish records to be digitized and placed online. I have found a great deal of information about these Rubels in Niederroedern and am working on teasing out more. Here is the link for the Bas-Rhin civil registers.
http://archives.bas-rhin.fr/scripts/accueilanglais.asp It can take a bit to figure out how to use it, especially since it is in French, but there are literally millions of records there. I have made fantastic progress on my Alsatian lines with good primary source documents. Jean/Johannes Rubel married Marguerite/Margaret Schaeffer in 1834 in Niederroedern. She already had her first child, Maria Eve, an illegitimate birth, as indicated on both the birth record and Margaret's marriage record. The parents of Jean Rubel are Jean Rubel and Barbe Bieth. The parents of Margaret Schaeffer are Johannes Schaeffer and Maria Eva Kachelhoffer. Let me know if I can be of further assistance.