You could check out nicotine wholesalers that are approved ECF vendors, and try some from there. Obviously, I don't have a flavor recommendation.
Also, what your daughter did sounds lovely, but generally that type of "DIY" isn't recommended on ECF. Sugars and particulate matter (even strained out) tends to cook on your coil, and it's not considered healthy for vaping, due to the introduction of a lot of undesirable "things" in the vape that tend to not vape well and/or will caramelize and crystalize on the coil. I have tried such a (brief) experiment early on, by adding a few drops of burgundy to a tank, once (I knew what would happen, and was curious what would happen, still). It wasn't good, those few drops immediately cooked on my coil and while it didn't taste awful well, it smelled exactly like curry. I replaced my coil and did a through cleaning of my tank and replace my coil, post haste. I'm still alive and vaping, but it's not a practice I would ever repeat. Etc.
So, while I can't recommend a specific cherry flavor and I think many of them would taste horrible to me (I loathe artificial cherry flavoring for the most part) my solution is to avoid it, not mix up a "real" cherry mix, as although it might improve taste, it really isn't considered safe, certainly less safe than artificial flavoring which at least has a track record in vaping. So, I would try to find a cherry you can tolerate and if failing that, I would just look into other fruits and flavors there are tons of good ones. My life won't end if I never get to vape "cherry" let me put it that way. I will be fine.
Anna