Amazon.com: TCT Premium Compatible Toner Cartridge Replacement for Lexmark C540 C540H1CG Cyan Works with Lexmark C540N C546DTN, X543DN X548DTE Printers (2,000 Pages) : Office Products
Lexmark C540N Cyan High Yield Toner Cartridge, Genuine (G0736)
Amazon.com: Lexmark C540, C543, C544, C546, X543, X544, X546 Series High Yield Magenta Return Program Toner Cartridge (2,000 Yield), Part Number C540H1MG : Office Products