Jennifer from Melbourne posted this little recipe to the TechKnit list. It can be used in place of a commercial wool wash.
Before it was developed as a commercial product, Eucalyptus wool wash was made at home to the following recipe. This might not be the same as Eucalan, as I haven't come across it here, but it *is* no-rinse.
Mix well together, it's rather thick and gluggy. Use one tablespoon of mixture to a bowl of water.