Based on this product's specifications, here are some alternatives and similar models
SFP Transceiver Module StarTech J4858CST - 1000BASE-SX 1GbE Multimode LC 850nm 550m DDM
Summary description:
Compatible SFP fiber optic transceiver module for 1 Gigabit Ethernet, model J4858CST by StarTech. Supports 1000BASE-SX over multimode fiber at 850 nm with LC connector and reach up to 550 m. SFP interface, max data rate 1250 Mbit/s, DDM support, aluminium silver housing, typical power 1 W and MTBF about 3,381,761 h. Compact hot-pluggable 1GbE module for switches and routers.