One key should operate all the external locks and ignition on your Vanagon.
There is a different key for the glove box, and MAY be a diferent key for
the fuel cap, depending on the cap.  Some caps take the regular ignition
key, and some use a much shorter key.  There are no rekeying kits available
for gas caps.  In your case, I'd leave the ignition in and have the other
locks rekeyed to match.  I do it via mail all the time, but there might be a
bit of a delay for me to di it for you, as you are in the Netherlands.  I'd
suggest finding a good, full service locksmith locally and discussing the
problem with him.  I don't have any idea what charges would be there, but I
charge $12 per lock here.  The charges will be less if you remove the locks
for the locksmith and take the handles and rear lock to his shop, rather
than him removing them.  If you are not familiar with removal, I'll be happy
to give you the instructions.  Please let me know if you have further
questions.
Steve Sandlin
Steve's Lock Shoppe
http://www.steveslockshop.com
'84 Wolfsburg Westy
'79 Transporter
'00 New Beetle
_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com