http://russian-uniform.com/
http://www.soviet-propaganda.com Run by Dimitry
http://frontowiec.com/ Run by Konrad
http://equipcenter.ru ZIP on ASC is there Canadian Rep
I have personally dealt with Konrad, ZIP and Dimitry and they have top notch service.
Also sign up on
http://www.red-alliance.net . This is the main hub for Russian, Eastern Bloc ect forum. Everything you need to know and what/where to buy.