I posted this question on the WWI forum, but there hasn't been a response so far.
Perhaps the modelling forum is a better place.
I'm looking for a WWI U-Boat kit, but have had absolutely no luck finding evidence that any are or have ever been produced. Does anyone know of any? I have very few requirements; I have none as to scale, media or type. I would prefer to find a UB II kit, but any of the other types would also suffice.
If it turns out that there just aren't any available, where should I go to find schematics of these boats? I may end up scratch-building one, but wouldn't get very far without decent reference.

Thanks...