My 4 month old daughter also had an ongoing eczema problem. A friend gave me Baby's Bliss Baby Derma Cream...which worked wonders! You can find it at
http://www.blissbymom.com/Products/Detail.aspx?product=baby-derma-cream
This product along with the occasional bit of cortisone cream has worked MAGIC on our daughter's eczema! It is a little on the pricey side but totally worth it for us!