Black Everyday Toner from Xerox - replaces Lexmark 64015HA, X644H11A - 006R04444 - Shop Xerox
Clover Imaging Remanufactured Universal High Yield Toner Cartridge for Lexmark T640/T642/T644, Dell 5210/5310, IBM 1532/1552/1572 - Walmart.com
Amazon.com: MICR Toner International Compatible Magnetic Ink Cartridge Replacement for Lexmark T644 T64435XA T Series T644 T644dn T644dtn T644n T644tn : Office Products