Based on this product's specifications, here are some alternatives and similar models
Power Adapter IBM 90W 20V 4.5A
Summary description:
The IBM 90W power adapter is designed for laptops, providing a reliable power supply with an input voltage of 100-240V. Its compact black design makes it suitable for indoor use. With a power output of 20V and 4.5A, it ensures efficient charging and performance for your device. Model number: 42T4429-RFB.