I gave up on the refilled color cartridges for HP. Nothing but trouble.
I am looking for a source for NEW C6578 cartridges. I tried a search, but nothing decent turned up.

Thanks............

Maybe something here will fit your budget:
http://www.bizrate.com/buy/products__cat_id--444,keyword--c6578,search_box--1,sfsk--2.html

I would suggest staying away from off-brand ink. If you use generic ink, it is very likely you'll destroy your printhead. Once that is ruined, it's cheaper to buy a new printer than get it fixed. I'd suggest spending a little extra money on genuine ink cartridges. It'll make your printer last longer and save you money in the long run.