I am looking into data for an article and I am missing a pretty important map. The map relates to this question. I need a map of Bavaria communes, the so called gemeinden divisions, either to buy or freely available, raster or vector format. I would accept any format that can be imported into a GIS software, but it needs to represent the period prior to 1930.
I have spent around 5 hours already and all I could find related to the map I am looking for is in the link to the other question. I mean I found other sites, and old books, but nothing concrete.