I am extremely picky as well and I'd hate to tell you but you will NEVER find anything like Looper. Philip Rocke (creator of Looper) makes his own extracts which is why it has a distinct taste and every other Fruit Loop flavor has that same citrus taste to it.
Looper is in my ADV rotation along with two other cereal vapes. If you like Trix, then the only juice in existence that tastes EXACTLY like Trix is Turning Trixxx from Liberty Vapor. Right now, this flavor is the most popular flavor in the Baltimore Metro area and only one store in a 50 mile radius can carry it as per Liberty's policy. There are people driving from all over to this one vape shop just to get this juice. Every other vape shop in the area tried getting it but were informed they couldn't due to Liberty's policy. These stores have a few different Trix juices but they will readily tell you that it's not as good as Turning Trixxx. Seriously man. Try this and it will be an ADV for you.
Another one of my favorite cereal vapes is brand new and it's also from Liberty. What can I say. I guess the guys over at Liberty know what they're doing when it comes to cereal flavors. This flavor is like no other out there and it could quite possibly be a first. It's called Franklin Berry and yes, it mimics Franken Berry. I got two bottles of this stuff this past Friday and I'm already half way through the second bottle. It has a nice smooth Strawberry, Marshmallow cereal taste to it and just like Turning Trixxx, this too tastes exactly like what it's supposed to.
I will forewarn you. These juices are the same price as Looper but after vaping Turning Trixxx and Looper, the cheaper Fruit Loops and Trix juices just don't do it for me.
Funny... came in here to plug Liberty's TurningTrixxx and Franklin Berry and saw your post!
Liberty Vapor is 6 blocks from my house... and yes i'm lucky
Franklin Berry is unreal good... my ADV lately.