Is there still a cartridge refill shop in Rosario? I think I passed one in one of the side roads near Rocasa some years ago, is it still there?
Found one. It's called Tinten Toner Tankstation on Avenida Juan de Bethencourt, beside the garage near the roundabout. There is a website www.tttankstation.de (http://www.tttankstation.de)