Hi,
the units models are inside the units.scd file found in the gamedata folder. You can open scd files by renaming them .zip
In the units folders inside units.scd (ex: url0303) the Lod0 file are where the 3d model of the unit can be found if I'm not wrong.
You can export them to 3dMax and Blender with the exporter files you can download here:
http://forums.gaspowered.com/viewtopic.php?f=35&t=73830 and here :
http://forums.gaspowered.com/viewtopic.php?f=35&t=8582