Be Green Ink Compatible Replacement Black Toner Cartridge for Lexmark MS310dn MS312dn MS315dn MS410dn MS415dn MS510dn MS610dn 50F1H00 Black Toner (2 Pack 5,000 High Yield) Ink Cartridges (Aftermarket) - Newegg.com
MSE IP-Compliant 50F1H00 Toner Cartridge Black MSE02246116 Lexmark MS415dn MS315dn MS312dn MS610dtn MS610dn MS610dte - Sun Data Supply
Lexmark MS312dn Toner Cartridges from $59.99 | CompAndSave