Lang,
Is this for your next trip across half of the globe or similar?
A good place to search in Europe is always
www.milweb.net, but if you want to search in Holland the best site to search is
www.gaf92.nl . Go to
http://www.gaf92.nl/generaaltjes/index.php and go to "zoek in advertenties" to search the ads.
I could go and check one out for you if you wish?
Hanno