Hi Ton,
If you want to buy the chips to use in your own hardware design, try NXP's distributors, see http://www.nxp.com/profile/sales/europe_dist/index.html. Arrow, Avnet/Silica and Avnet/EBV have sales offices in the Netherlands. These would however not be interested in selling you small quantities.
Your best bet if you need only one or a few would be Farnell, although they appear to be out of stock right now: http://nl.farnell.com/nxp/lpc1768fbd100/mcu-32bit-arm-cortex-m3-100lqfp/dp/1718549 . It's possible to buy from Farnell as a private person, see http://nl.farnell.com/images/nl_NL/pdf/Particulier_voorwaarden.doc
I am a bit confused.
There is this nice notebook entry explaining how to go ahead from a prototype.
http://mbed.org/users/chris/notebook/prototype-to-hardware/
Now I have been searching in Google trying to find a store or something where I can buy the chip in the Netherlands, but somehow I do not find it.
Where can I buy it? Or should I look for something else/another term or code?