Sierra Class Schematics

[Suspicious Looking Frog]

I want to make a 3d model of a Sierra 1 or 11 class submarine, however finding it difficult to find schematics. If someone has some or knows where I can find some that would be awsome.

Failing that, Alpha or Akula schematics so I can model 1 of them.

I am not actually modelling for a game, just as a CG project.

Any help much appreciated

Thanks