Tim hallo, did you ever try www.vorfahrensuche.de ??? click NAMEN, type only the first 3 letters, click SUCHEN, in case you find a result, click on the name, than on EINSENDER, contact him!!
If you will leave a message on the board: click on KLEINANZEIGEN, and try your best GERMAN!!!! But of course, you can leave your English message, I'm sure they will understand it!!!!
Best regards from Paris, SIGI