[TarJak]

There are some line drawing profiles here:

http://www.german-navy.de/kriegsmari...ehunter/rboat/

Found these:
http://www.topsoft.be/photoblog/imag...nesweeper2.jpg
http://www.topsoft.be/photoblog/imag...inesweeper.jpg
http://pro.corbis.com/Enlargement/En...HU048686&ext=1
http://www.militaryfactory.com/ships...holstein_4.jpg

Doesn't look like there is much about them online though.