maybe try your luck here: http://www.subsim.com/radioroom/showthread.php?p=1152450

Someone made the model on the frontpage. Anyway sounds like the place to go hunting for a submarine nut with 3D interests. 

Otherwise: there's plenty of images from a U-boat engine room on the web. Set one as background, add a few shadow catcher cubes and cylinders.  It may bring you a long way.