What about the trousers?
It seems like soviet Red Army from WWII russian Officer
Dou you know the Model?
Do you think Soviet Red Army WWII Russian Officer's, Soldier's pants Galife M43 could work?
http://www.sovietmilitarystuff.com/soviet-uniforms/red-army-uniforms/soviet-red-army-wwii-russian-officers-soldiers-pants-galife-m43.html
http://www.terapeak.com/worth/russian-uniform-galife-pants-military-soviet-army-rkka-wwii-ussr-world-war-2/301839948222/