Amazon.com: Compatible for Lexmark C540dw Toner Cartridge Replacement for Lexmark C540dw High Yield Toner Work with C540dw C540n C543dn C544n C544dw C544dn C546dtn X543dn Printe Black : Office Products
Amazon.com: Lexmark C540, C543, C544, C546, X543, X544, X546 Series High Yield Black Return Program Toner Cartridge (2,500 Yield), Part Number C540H1KG : Office Products
Amazon.com: Lexmark C540X34G Yellow Developer Unit for C54X Printer : Electronics