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
OTPG Remanufactured High Yield Cyan Toner Cartridge for Lexmark C540/C544/X543/X544 - Ott To Print Green