A web site about paper model ferries and other things. Mostly pictures of assembled commercial ferry paper models, but there is a link to a free ferry model download.
http://www.rcs2.de/index.html
One of the links listed on the above site is no longer with us, however it has been preserved here:
https://web.archive.org/web/2018*/ht...ww.skala-n.dk/
If you search carefully you will find some paper model ferries and harbor cranes to download.
A paper ship site that is resting until its owner understands the German legal code:
http://www.kartonwerft.de/