Cheers! No problem, I’d suggest reviewing What SFP+ Modules have been Tested with the Peplink Balance 2500? and work with some of the brands listed on the top. Let us know how the project goes. Martin suggested going with optical coverters, and I have done that as needed, but my preference is to know the link is from the transceiver itself.
What model router do you plan on deploying? Where in the world is the project? Sounds interesting!