Hi, you are missing quite a few good studios from the Balkans.
Vertex-Design - Macedonia - http://vertex-design.com.mk/
Red-Vertex - Bulgaria - http://redvertex.com/
Cosmocube - Bulgaria - http://www.cosmoscube.org
Case 3D - Serbia - http://www.case-3d.com
Studio niskota - Croatia - http://www.studio-niskota.hr/