Actually, here's another site for Soviet stuff: http://rkkaww2.armchairgeneral.com/uniform/uniform1.htm
I had been there before to do research for a presentation, but I found it again tonight.
I've decided to do the NKVD M1945 Parade Dress Uniform for the Soviet one. The American one hasn't been decided yet. I think I'll probably combine a women's uniform with a men's uniform in the end both because it's in character for what I'm doing, and I like getting to do a LITTLE designing for my big stage costumes.