Toner Bank Compatible Lexmark 601 60F1000 High Yield Black Laser Toner Cartridge for use in MX310dn, MX410de, MX510de, MX511de, MX511dhe, MX511dte, MX610de, MX611de, MX611dhe, & MX611dte - Walmart.com
Clover IP-Compliant 601X Toner Cartridge Black SUNMS510 Ultra Lexmark MX510 MX510de MX511 MX511de MX511dhe - Sun Data Supply
Amazon.com: Lexmark MX511 (60F1000) Black Toner Standard Yield (2,500 Yield) : Office Products