Hi Daniel,

You might find some good if you search for \"Planrolle\" or \"Planmappe\" at your local bookstore. Prints might still be available for the German Types U XXI, U IX, U XXIII and U XVII. Prints for the famous U VII Type boat are not available any more. These prints are partly copies from the original drawings and are meant for modelling. They have been produced by Bernard & Graefe Verlag in Germany anc are in DIN A 1 Format. They are also available in a smaller scale (postcard or DIN A 5) in the book series \"Vom U-Boot zum Modell).
In both cases the autors are Fritz Koehl et al.

Good hunting,

Uwe