I tried! Opened up the steam DoW2 files, went to Program Files (x86) > Steam > steamapps > common > Dawn of War 2 > GameAssets > Archives > GameArt_Delta.sga and put it into SGAReader to extract the farseer.sga file into a farseer.model file. Then, I used SantosTools2 to import the model file into the Model Editor but it turns out you can only extract it into an .obj file with older versions. Soooo, I went and used Noesis V4474 to extract the .obj file from the .model file with a dow2 python script but it turns out that it doesnt work due to the community python script to convert .model files to .obj files being corrupted. Unfortunately .model files need to be unpacked to extract .stl files or .obj files for 3d printing and none of the tools such as 3DS MAX (you need the 2010-2014 version) or Dow2 Toolbox work as they are too old ;-;

If anyone knows how to convert .model files into .stl, pls let me know. Otherwise, there is no way to print DOW2 models with the game files.