Based on this product's specifications, here are some alternatives and similar models
InLine Interface Card 4 Port Serial 9 Pin PCIe PCI-Express 76623C
Summary description:
The InLine Interface Card features 4 serial ports with a 9-pin configuration, utilizing PCIe technology for high-speed data transfer rates of up to 2500 Mbit/s. It is compatible with various Windows operating systems including 2000, XP, Vista, and Server editions. This card is ideal for connecting multiple serial devices, ensuring reliable wired connectivity and efficient data handling.