Yes and no
It won't be "legit" in the sense that you can use it on any system, but if you have an older version of the update installed, you can replace it with the newer version and it will still work as each update has the exact same tickets. I was able to use my 9.5 Gateway emuNAND, dump the tickets using rxTools and then build a CIA of the newest Pokémon OmegaRuby update in FunkaCIA which installed fine and let me go online again.
Hopefully that helps.