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
Amazon.com: Toner Eagle Re-Manufactured 4-Color Extra High Yield Toner Cartridge Compatible with Lexmark X543 X543dn X544 X544dn X544dtn X544dw X544n C540H1CG C540H1KG C540H1YG C540H1MG. : Office Products