Based on this product's specifications, here are some alternatives and similar models
Power Supply MITSU for Lenovo 20V 3.25A model ZM/LEN20325C
Summary description:
MITSU power supply for Lenovo laptops, model ZM/LEN20325C, providing 20V output at 3.25A. Designed as an external AC adapter to power and charge compatible Lenovo notebooks that accept 20V/3.25A input. Key features include the specified voltage and current rating, standard DC connector compatibility (check laptop requirements), and use for replacement or spare charger needs at home, office, or travel.