ambecomelife : Does Gulf of Finland operations interest you for the mod? If yes, then I have found some russian warships which operated in this area :
-4 Gangut class dreadnought battleships : Gangut, Petropavlovsk, Sevastopol, Poltava
Gangut_class_diagrams_Brasseys_1912.jpg
-3 Bayan class armoured cruisers : Admiral Makarov, Bayan, Pallada (sunk by U-26, 11 october 1914)
800px-Brasseys_Bayan_2.jpg
-2 Bogatyr class protected cruisers : Oleg, Bogatyr
-16 Orfey class destroyers
@I
(Sorry, I couldn't find any blueprint)
There are many others but I know this is a minor fleet (in terms of importance) for this mod.