Amazon.com: Awesometoner Remanufactured Made in USA Toner Cartridge Replacement for Lexmark 78C0040 78C00YG 78C10Y0 CS421 use with CS-421, CS-521, CS-622, CX-421, CX-522, CX-622, CX-625 (Yellow, 1-Pack) : Office Products
Print.Save.Repeat. Lexmark 78C1XC0 Cyan Extra High Yield Remanufacture — PrintSaveRepeat.com
CS421/CS521/CS622 Series—Replacing the waste toner bottle - YouTube