Based on this product's specifications, here are some alternatives and similar models
Lancom Systems SFP-BiDi1550-SC1 SFP fiber optic transceiver 1000 Mbit/s, silver
Summary description:
SFP fiber optic transceiver Lancom Systems SFP-BiDi1550-SC1 with SFP interface and maximum data rate 1000 Mbit/s. Designed for single-pair BiDi fiber links using SC connector format; compact module in silver housing. Suitable for Gigabit Ethernet and other 1 Gbps fiber applications where a BiDi SFP module is required.