HP 56 57 Ink Cartridge Combo Pack of 5 - HP 56 and 57 @ $62.95
Amazon.com: HP 56 Black Ink Cartridge | Works with HP DeskJet 450, 5000, 9600; PhotoSmart 7000; OfficeJet 4000, 5000, 6110; Digital Coper Printer 410; PSC 1000, 2000; Fax 1240 Series | C6656AN : Office Products
Amazon.com: GREENBOX Remanufactured 56 57 High-Yield Ink Cartridge Replacement for HP 56 57 C6656AN C6657A for Deskjet 5650 5550 5150 Photosmart 7350 7260 7450 7550 7760 PSC 2210 Printer (1 Black 1 Tri-Color) : Office Products
Compatible HP 56 & 57 Ink Cartridge (Black, Color) by SuppliesOutlet
HP 56 & 22 Compatible Ink, 78% off, Fast Shipping | InkjetsClub
Genuine HP 56 (C6656AN) Black 2PK Ink Cartridges – Planet Green Recycle