Digital BW, The Print

I have been using MIS VM prefilled cartridges to print to my
Epson 1280 printer from my Macintosh G4 laptop.  I would like 
to use a continuous inking system.  I had ordered a Niagara system
from mediastreet.com but the original Niagara systems are no longer
available.  They have a new Niagara II system, but they only come
prefilled with the Generations or Plug and Play inksets.  I don't 
want the ink and the Niagara II is not available without ink.

I want to use the MIS VM inks.  Any ideas on how to do this
with a CIS on a Macintosh?