Naruto x Ino is such an oddly specific pairing that it really forces creativity, especially with crossovers. I've read a few that tossed them into 'The Witcher' universe, which somehow worked because Ino's mind techniques got reinterpreted as Signs. The weirdest part was seeing her and Naruto navigating a morally gray world together—it changed their dynamic from the usual Konoha stuff.
For finding these, I always hit up Archive of Our Own first. The tagging system is a lifesaver. You can filter for 'Naruto/Ino Yamanaka', then add 'Crossover' and maybe 'Alternate Universe'. Sometimes people tag crossovers poorly, so I'll just search 'Naruto Ino crossover' and sort by kudos. There's a writer named shiratama who does these insane crossovers with 'Lord of the Rings', of all things. It shouldn't work, but the focus on clan politics and mental realms fits surprisingly well.
Don't sleep on FanFiction.net's community filters either, even if the site feels ancient. Some authors only post there. I found a massive 'Naruto x Ino x Attack on Titan' story that was buried because it wasn't tagged as a romance, just as an action crossover. Took some digging.
My last resort is just googling the pairing plus the fandom I'm craving. Sometimes the best stuff is on tiny, personal forums or even posted directly on Reddit's r/NarutoFanfiction. The quality is hit or miss, but the ideas are usually wild and original, which is half the fun for a niche request like this.