Would this be possible?

[Lowlander]

John Tillers Campaign Series has a Mega Stalingrad Scenario of the whole city, can't recall if this was included in the Matrix version or was a download, based on the original Dana Lombardy game Streets of Stalingrad by Pheonix Games.
The scenario is Volga Inferno by Greg Allen.
The remake L2 game playing map is larger I.E. along the Volga/flanks of Stalingrad.

So maybe this mod could be a starting point and could be expanded and upgraded using the L2 version. Hope this helps.
SimBase Scans have all the L2 version unpunched counter sheets available for downloading which would help with the OOB !!!.

Oh by the way I've started selling various wargame stuff on ebay, books and games first, followed later by thousands of painted figures but the original Streets of Stalingrad game will also be up for grabs over the coming weeks.