A rarity on ebay on sale in Europe.
 
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=7413154003&ssPageName=ADME:B:SS:UK:1
 
Jazzyvee

I ran a translation of the text, but it doesn't say whether the Wilson piezo pickup was installed by Alembic.  Nor does it say much about the lateral support.  I'm guessing the Wilson was added later and wondering if the lateral support was as well.