Kyocera FS-4200 Toner - ECOSYS FS-4200DN Toner from $39.95
Amazon.com: Kyocera 1T02L10US0 Model TK-3122 Black Toner Kit For use with Kyocera ECOSYS FS-4200DN, M3040idn, M3540idn and M3550idn Laser Printers; Up to 21000 Pages Yield at 5% Coverage, Pack of 2 :
Office Depot
Kyocera FS-4200DN Black Toner Cartridge, Genuine (G2198)
Compatible Copier Printer Laser Tk-3102 Toner for KYOCERA (FS-2100DN/2100D/ FS-4100DN/FS-4200DN/FS-4300DN/M3040dn/M3540dn) - China Toner and Printer