Photo material / info of 'The Silver Fleet'

Does anyone have any photo material of the movie "The Silverfleet" ? Scans are ok, I don't need originals.

I am especially interested in the Dutch Navy personel that was in the cast:
Lieutenant Schouwenaar .... U-Boat Captain
Lieutenant Van Dapperen .... U-Boat Lieutenant

But all other images/info related to this movie, or to Van Dapperen or Schouwenaar, is very welcome as well.

The only thing that I have is the little booklet (more a leaflet) about the movie.

Thanks in advance

Drebbel
[email protected]