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
Lexmark C540 Black & Colour Imaging Kit 0C540X74G
Lexmark C540, C543, C544, X543, X544 Black & Color imaging Kit - Alberta Business Supplies