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
Office Depot Brand Remanufactured High Yield Black Toner Cartridge Replacement For Lexmark C540 OSC540B - Office Depot
Lexmark C540 Toner Cartridge 2 Pack Black High Yield Replacement by Smart Print Supplies