(http://club.alembicguitars.net/Images/395/109365.jpg)
Saw this on ebay today. The sustain block looks very oversized.
http://www.ebay.co.uk/itm/1986-Alembic-Explorer-4-String-Bass-OHSC-/350478559442?pt=Guitar&hash=item519a2668d2#ht_948wt_1022
Jazzyvee