Based on this product's specifications, here are some alternatives and similar models
Adapter Rockforce 3/8" female to 1/2" male, RF-80634
Summary description:
Thread adapter Rockforce RF-80634 converts a 3/8" female connection to a 1/2" male connection. Designed for joining tools or accessories with differing thread sizes, it is suitable for socket wrenches, accessories and extension bars. Compact and simple to use where interchange between 3/8" and 1/2" drive sizes is required.