Based on this product's specifications, here are some alternatives and similar models
Fiber optic transceiver module BlueOptics 474943A-BO 40000 Mbit/s QSFP
Summary description:
The BlueOptics 474943A-BO is a QSFP fiber optic transceiver module with a maximum data transfer rate of 40000 Mbit/s. It is compatible with Nokia equipment and operates at an input voltage of 3.3 V. The compact design features dimensions of 18.3 mm width, 130.4 mm depth, and 8.5 mm height, making it suitable for high-speed networking applications.