Based on this product's specifications, here are some alternatives and similar models
DELOCK M.2 to 8x Serial RS-232 DB9 Adapter Card
Summary description:
The DELOCK M.2 to 8x Serial RS-232 DB9 adapter card provides eight high-speed serial ports for industrial and professional computing applications. Designed for M.2 slots, this controller allows for the connection of multiple serial devices such as scanners, sensors, and legacy hardware. It ensures reliable data transmission and is an ideal solution for expanding connectivity in compact systems requiring extensive serial interface support.