Lexmark X544n Extra High Yield Toner Cartridge Set | eBay
Lexmark Set of 4x Toner C/M/Y/K C540/C543/C544dn/C544dw/C546dtn/X543/X544/X548DE | eBay
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