Dairy free formula

I sent a message to my ped but they are slow.

My son is super sensitive to any dairy of any sort in my diet. Like gyser spewing reflux. Per my last post I want to start a little bit of formula but is there one that is actually good for totally dairy free child? Googling it is kind of confusing because it looks like some of the formulas recommended still I’ve dairy in them. My tube fed 2.5 year old is on a dairy free amino acid one but it’s so expensive and she’s on the toddler formula anyways so I can’t use it.

Thanks!