Lexmark B341 Original Toner Cartridge - High-Yield, Laser, Up to 3000 pages, Black, for Lexmark B2442dw, B3340dw, B3442dw, MB2442adwe, MB3442adw, MB3442i - B341H00 at TigerDirect.com
Office Depot
Lexmark Black Return Program Toner Cartridge for B2442dw & (B341000)
Lexmark B241H00 B240HA0 Toner Cartridge Black B2442 B2442dw B2546 B2546dw B2650 B2650dw MB2442 MB2442adwe MB2546 - Sun Data Supply
Amazon.com: 2PK Compatible B241H00 B2442 Remanufactured Toner Cartridges Black Replacement for Lexmark MB2442adwe MB2546ade MB2546adwe MB2650ade MB2650adwe Printer Cartridges,Sold by SITIBINK : Office Products