Visiting Salou with a baby in May - Need some help with Baby Formula, nappies, etc

Hey, we are coming for 3 weeks in May. We can't travel with all the formula & nappies we need so we need to buy them over there. Can someone please recommend a Pharmacy or Ex-Pat supermarket that would have british brands, Cow & Gate and Pampers?

We also need to get a travel cot, a bath, and a high chair. We are thinking of buying these on Amazon and getting them posted there in advance, but it would be OK if we could rent/hire, or buy them from a supplier there.

Thanks, Sean.