Hi Rombout,
The so called Liberation Questionnaires, a kind of POW debriefing reports made up after the war, might contain the info where the crew members were captured.
The files are kept in the WO344 class document reference in The National Archives in London. There's an option to request digital copies, just consult there website on:
www.nationalarchives.gov.uk
Good luck!
Hans Nauta