Several member unions offer on-line databases of freelance members:
UK & Ireland: NUJ Freelance Directory
Germany: DJV-Datenbank Freie Journalisten
Sweden: SJF Frilanskatalogen
Finland: Finnish Freelances (go to FREE-LUETTELO)
To find a freelance in another country, or one not listed in the directories, contact a journalists' union in that country.
They cannot give out addresses without specific advance permission from the member. Most will be able to forward your message to a member, if you allow enough time.