I am fairly certain that SMA milk in Spain is called Nutraben, Cow & Gate is Nutricia and both are easy to find in supermarkets or pharmacias.

I don't know how much it is, we took our own brand with us in the suitcase along with a cheap microwave/cold water steriliser which we left behind. We were travelling with our then, 7 month old twins and 4 year old with just 2 suitcases - God knows how we managed it but we did.

Tis