Dear Mummy, I’m sorry this took awhile for a response. I tried to google for you and in my opinion these 2 may be the best option for you, Nan lactose free has 400g which cost 20ish and wont be too wasted if you child rejects the milk, similac tho is a little bit on expensive side and it’s hypoallergenic which could help reduce triggers that may cause his rash. What I can suggest is, introduce the new formula, whichever you chose, when he is hungry so there’s more likelihood for him to accept the milk and let the baby get used to the taste. This is just based on own research, its best to seek medical advise. Having a baby that is suffering from eczema, I just gotta say it’s all about trial and error. I hope you’re doing ok there Mummy, don’t worry too much!