Based on this product's specifications, here are some alternatives and similar models
Developer unit Konica Minolta A1UC550 — 55,000 pages yield, black
Summary description:
Konica Minolta A1UC550 developer unit designed for monochrome printing systems. Specified page yield is 55,000 pages and it handles black imaging for compatible Konica Minolta devices. Used to maintain consistent image density and toner transfer, this unit is intended for routine replacement in office or light production environments to ensure stable print quality.