MIKROTIK Kit of two combined 1.25G SFP, 10G SFP+ and 25G SFP28 modules (XS+2733LC15D) - The source for WiFi products at best prices in Europe - wifi-stock.com
Cisco SFP-10/25G-CSR-S Compatible 10/25GBASE-SR SFP28 850nm 100m DOM Duplex LC MMF Optical Transceiver Module - FS.com
SFP-2510-LR - 25G single-mode SFP28 transceiver, LR, 1310nm, max range 10Km on SMF, dual LC connector
Cisco SFP-10/25G-LR-S 25G LR SFP28 Transceiver | FiberMall