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 range of 100-240V. This indoor adapter features a compact black design and delivers 20V at 4.5A, ensuring efficient charging and performance. Model 42T4425-RFB is perfect for users seeking a dependable power source for their devices.