Digital BW, The Print

I have an old Stylus 750 sitting on my desk. Lately I've been reading
a bit about Black Only printing and would like to try some "real" ink,
preferably pigment-based carbon-black ink like Ebony.

However I can't find anyone selling cartridges for my old printer. If
anyone can tell me where to find this or if it's just impossible I'd
be grateful. 

Regards /Kent