It does indeed cost a fortune, Midnight Shadow. I use YES water-based moisturiser (available on prescription!) and they also have a new one now, YES VM, which is especially designed for VA. I haven't tried that one, but their website has lots of information on this. Apart from using the moisturiser regularly on the days I don't use the Estriol Cream, I also use it whenever things feel a bit itchy/sore etc.,
Hope that might help!