Based on this product's specifications, here are some alternatives and similar models
PCI Express Serial Card StarTech.com 11050-PC-SERIAL-CARD RS232 16C1050 UART
Summary description:
The StarTech.com PCI Express Serial Card features a PCIe interface, RS232 output, and supports baud rates up to 921.6 Kbit/s. It includes standard and low-profile brackets and is compatible with Windows and Linux operating systems.