Based on this product's specifications, here are some alternatives and similar models
DC power jack for Lenovo ThinkPad T40/T41/T42 by extra digital (MPN PJ340682)
Summary description:
Replacement DC power jack compatible with Lenovo ThinkPad T40, T41 and T42 notebooks. Manufactured by extra digital (MPN PJ340682), this socket provides the interface for external power adapters to charge the laptop and supply DC power. Designed for repair and replacement of a damaged or worn DC inlet, it restores charging functionality and power connection reliability.