My brother has extreme siriasus (sp?) and couldn't find anything to help. (It's a skin condition similar to exema, except the dry skin also builds many layers, causing scabs of incredibly dry & dead skin). He recently started using Emu oil (from company Dreamu) and it's working great -- moisturizing, repairing and re-generating the dead and dry skin. it's like an oil, just apply three times a day. it's completely natural and we haven't seen a single side effect.
It might be worth a try!
Also, there's a store called Athena's Home Novelties, they sell adult novelties but also cosmetic and bath products, they have a "Lavender" stick which is very moisturizing as well, and helped a friend of mine with ezcema.
Hope you find something that works for her!