Digital BW, The Print

I'm trying out the various MIS cartridge ink sets on my 1280 before I 
settle on one and probably install a CIS.  It just dawned on me that 
as far as I can tell the only B&W ink in a cartridge is VM.  I'd like 
to try the FS ink too but it only comes in bulk plus the link to John 
Woolf's workflow through MIS isn't working.  Is the FS ink available 
in cartridges from other sources or am I missing something at MIS?  
Are there other inks available in cartridges I should consider?

Thanks for your help,

Tom Husband