Amazon.com: SuppliesMAX Compatible Replacement for Kyocera Mita ECOSYS M3550idn/FS-4200DN Black Toner Cartridge (21000 Page Yield) (TK-3122) (1T02L10US0) : Office Products
Amazon.com: APRONE TK3122 TK-3122 Toner Cartridge Replacement for Kyocera TK-3122 1T02L10US0 Extra High Capacity Use for Kyocera ECOSYS FS-4200DN M3550idn (21500 Pages,Black,2-Pack) : Office Products
Toner for select Kyocera printers - Replaces TK-3130
Do it Wiser Compatible Printer Toner Cartridge Replacement for Kyocera TK-3122 Kyocera Ecosys FS-4200DN M3550idn 1T02L10US0 (Black) Printer & Scanner Supplies - Newegg.com