You can also consider materials in the archive of the Centrum Judaicum in Berlin. It contains a large part of the materials collected by the Gesamtarchiv dear Deutschen Juden zu Berlin. The catalogue of this archive is in the form of a 2-volume book: Quellen zur Geschichte der Juden in den Archiven der neuen Bundesländer: Stiftung "Neue Synagoge Berlin Centrum Judaicum"
(I think I have checked the excellent index for Militsch records, but I do not recall how extensive the materials are for this town.)
All the best,
Point Roberts, WA, USA