Amazon.com: Lexmark X543 (C540A1KG) Black OEM Toner Standard Yield (1,000 Yield) : Office Products
Everyday Black Toner compatible with Lexmark C540H2KG; C540H1KG, High Yield 006R04470 - Xerox
Lexmark OEM C540X33G Magenta Developer Unit – P1inMotion
LEXMARK X543DN TONER CARTRIDGES - C540H2KG SERIES CARTRIDGES
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