Welcome John,
If you get no joy then try a post on WW2Talk -
http://ww2talk.com/index.php
The following ships known to have been in Boulogne during the time period of your interest.
FERNCOURT
LEKHAVEN (Du)
KELBERGEN (Du)
TARANGER (Nor)
EMMAPLEIN (Du)
SKANDINAVIA (Nor)
Regards
Hugh