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
Compatible Lexmark C540 Toner Cartridge (All Colors) by SuppliesOutlet
Smart Chip for LEXMARK - C540, C543, C544, C546, X543, X544, X546, X548 - BLACK - InkOwl
TCT Premium Compatible Toner Cartridge Replacement for Lexmark C540 C540H2KG Black works with Lexmark C540N C546DTN X543DN X548DTE Printers (2,500 Pages) - Walmart.com
Image Transfer Unit (ITU) TRANSFER BELT ASSEMBLY For Lexmark C540 C543 C544 X543 X544 X548 C544DN C544DTN C544N C546DTN 40X5403 - AliExpress Computer & Office
Lexmark C540X74G Drum Photoconductor black & color C540 C540n C543 C543dn C544 C544dn C544dtn C544dw C544n C546 - Sun Data Supply