http://www.the-blueprints.com/index.php?blueprints/
So far this is the best website for blueprints. (heard it from 3DK forum, and I am a member of that forum too) I don't know will it be able to use in Blender, but I'm sure they can be used in 3DS Max (because I'm using it).
I think I will make an example model soon after this post.....
Thanks

Edit : It also helps us to make nice texture, just 'colour' and maybe add something at the blueprint and thats it. (I haven't check is it 'free for use', but since its free for us to use and the game is not commercial, I think we can use it.