I did 2 huge posts on the Nagant holsters, unfortunately all the pictures were lost in a software upgrade by Gunboards. What specifically are you looking for?
Holsters from the first part of the war are leather and based on the pattern 1932 holster. Universals (for Tokarev or Nagant) were leather in the 1930s and quickly became substitute materials as the war started.
There were also varieties for troops who had to sit on duty - pilots, tank crews, drivers etc. They used suspension holsters that hang down from a belt.
I'll reduce some images to the size nec to post and put them up for you. (I'm working on my Korovin pages at RussianRevolvers.com right now.)
Here is part of my Nagant holster collection.