Based on this product's specifications, here are some alternatives and similar models
InLine Interface Card 2x Serial 9 Pin PCIe InLine 76619C
Summary description:
The InLine Interface Card 2x Serial 9 Pin PCIe (Model 76619C) features a PCIe host interface and is equipped with the Moschip MCS9922 CV chipset. It supports a maximum data transfer rate of 0.25 Gbit/s (250 Mbit/s) and is designed for wired connectivity. Compatible with various operating systems including DOS, Windows 7/Vista/XP/2000/Server 2003-2008, Linux, and Mac OS X 10.5, this card is ideal for enhancing serial communication capabilities in your system.