Based on this product's specifications, here are some alternatives and similar models
Interface cards adapter EXSYS EX-45032
Summary description:
The EXSYS EX-45032 is a PCIe interface card that provides serial communication through RS-232/422/485. It features a FIFO buffer of 16 bytes and supports data bits of 7 or 8, with stop bits options of 1, 1.5, or 2. This card is ideal for applications requiring reliable serial communication and offers flexibility in data configuration.