Around the beginning of the year, Walmart had some refill kits at their checkouts, from OnTel. I got a black only starter kit for <$20. The OnTel company seems to be buried within
Universal-Inkjet, and Universal Inkjet also has a different branch called CBW, now known as Kalvins
Kelvins Refill kits. The black starter kit at
this link is what I bought at Walmart (different printing on the retail box, though).
Shopping around in the Kalvins site (
here), I see gallon jugs and smaller quantities.
I like what I got for my money, but there is nothing in my starter kit for resetting the cartridges (some cartridges count the droplets, and when the count hits a limit, the cartridge refuses to fire, no matter how much ink is in the cartridge).
I cannot vouch for these merchants, Universal Inkjet, Kalvins, OnTel or CBW; I can only say that the Walmart refill thing works slick, has very good docs, and worked for me on my older style HP cartridges and one Canon cartridge.
The downside is that one HP cartridge has leaked, essentially my fault, but the leak emptied a half full cartridge inside the (old) printer. Hope it still prints.....