It's importante to get a delivery system that assures that the mail is delivered to the right person, in portugal many companies use a delivery system where the receiver has to sign a postal recipt, thus, the mail doesn't get lost. Maybe this system would work out for you too.
If you get back to business, i'll be interested in a few map sets:
They are all from units engaged in the eastern front in 41-42 in the Heeresgruppe Nord
A.O.K. 9 18.09.1941 up to 28.09.1941
I.A.K (A.O.K 16) 29.09.1941 up to 10.10.1941
Gruppe Von Roques (A.O.K. 16) 11.10.1941 up to 13.11.1941
XXXVIII A.K. 14.11.1941 up to 24.07.1942
(maps of the Heeresgruppe Nord between 18.09.1941 and 10.10.1943 may also be of my interest)
This units and specific dates are related with the path of the 250 infanterie division (Blue Division), so, if you have other maps where this division is displayed, i'll be very interested on them.