Would it be possible to make a piece of mountable equipment, or perhaps a specific ship, which would make the ship completely undetectable on sensors... But only when completely unmoving, or moving at a slow speed (like, 80, a normal ship not thrusting or cruising)? Ideally it would take up a couple hundred units of cargo room, like a capship armour upgrade, to make it so every ship out there wouldn't have one. It would be a large, expensive piece of technology which would only be worthwhile to certain people (recon freighters or gunboats, smugglers, etc.)
Not exactly a cloak... A sensor mask. The ships would still be completely visible to the naked eye (and large ships are very visible to the naked eye). If someone clicked on the ship, they'd show up and be scannable.