I'm looking for an Alembic style 6 string guitar bridge - does anyone know where I can purchase one (or similar)?

James,
 
Just call up Alembic. My relationship with them actually began with a bridge and tailpiece that I ordered, for a custom guitar I was having built by another luthier. You'll be pleasantly surprised at the personal touch for even a small order such as that.
 
Regards,
 
Jonathan