Based on this product's specifications, here are some alternatives and similar models
SFP Transceiver OEM X121 1G LC LX J4859C — 1 Gigabit, LC connector, LX (single-mode) optical module
Summary description:
SFP Transceiver OEM X121 1G LC LX J4859C is a 1 Gigabit small form-factor pluggable optical module with an LC connector supporting LX single-mode fiber links. Designed for network equipment with SFP ports, it provides fiber connectivity for long-distance Ethernet or telecom links, enabling reliable data transmission, easy hot-swapping and compact installation in switches, routers and media converters.