Out cat used to throw up all wet food so we also supplemented with cat lickies. There are numerous brands available, I have no idea why they have to be called "Churu" now. That brand doesn't even exist here.

I assume you've tried shredded/gravy wet foods? In my experience they're much more popular than the patés. My understanding is your vet is totally correct: it's really important for cats to get moisture from their food, so it's worth it to keep trying to find something your cat will eat!