Based on this product's specifications, here are some alternatives and similar models
DeLOCK M.2 Card to 2 x Serial RS-232 DB9 PCIe 2.1
Summary description:
DeLOCK M.2 Card to 2 x Serial RS-232 DB9 features PCIe 2.1 interface, supports Windows and Server OS, compact design with standard and low profile brackets.