There ought to be. I bought four ounces of sweet orange essential oil, one of cinnamon, and two of clove (this was by mistake but I use clove for other things anyway). Since the essential oils are my real limiters- I can scale up the recipe, the other ingredients come in larger containers- I should be able to do a good number of bars for people.

I can probably also do up a batch of regular soap rather than solid shampoo, too, although I have to decide on the scent to use and a basic oil formulation.