Pretty reasonable starting price.
http://www.ebay.com/itm/Alembic-F-1X-Bass-Preamp-/261363763037?pt=Guitar&hash=item3cda7e875d (http://www.ebay.com/itm/Alembic-F-1X-Bass-Preamp-/261363763037?pt=Guitar&hash=item3cda7e875d)
There is one also on sale in the UK
http://www.ebay.co.uk/itm/281285366473?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT (http://www.ebay.co.uk/itm/281285366473?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT)