Based on this product's specifications, here are some alternatives and similar models
Interface Card Exsys EX-42372IS Internal Serial
Summary description:
The Exsys EX-42372IS is an internal serial interface card designed for PCI slots, supporting RS-422/485 serial communication. It is compatible with various Windows operating systems including Windows 2000, Windows XP Professional, and Windows Server 2008. This card operates efficiently within a temperature range of 32 to 131 °F, making it suitable for diverse environments. Ideal for reliable wired connectivity, it enhances your system's serial communication capabilities.