Unfortunately cannot help with the maps, but you could try to draw the quadrants yourself on contemporary maps or heeres map from the perod which are easier to find I believe. It seems fairly simple - I did it once on 1:100.000 maps of Charkow/Belgorod area.
As a guide:
http://www.stormbirds.com/eagles/res.../gradnetz.html
LUMA is also a wonderful tool
kind regards,
Pawel