Hi Bassplayer,
 
Try Edwin Van Huik:  he's the Alembic dealer in the Netherlands.  He has a couple of used Alembics now:  check http://www.connectionbult.com/bass/instruments.html#Basgitaren
 
I'm a guitar player but I think the better the instrument, the better the music you'll play on it.
 
Good luck in your quest,
 
Mark, ago

Hi Frits, You can usualy pick up used Alembic Spoilers  on eBay for a reasonable price. (some for under $1000.00) Spoilers are great basses and will last you a lifetime.