Based on this product's specifications, here are some alternatives and similar models
Interface Card DeLOCK 90410
Summary description:
The DeLOCK 90410 is a low-profile PCIe internal RS-232 interface card. It features a maximum data transfer rate of 0.0001152 Gbit/s and supports data bits of 5, 6, 7, or 8. With a FIFO buffer of 256 B, this card ensures efficient data handling. Its compact dimensions (61 mm width, 82 mm depth, 16 mm height) make it suitable for various setups. Ideal for expanding RS-232 connectivity in your system.