Do you have a TJ Maxx near you? I found lots of various formulas from this brand there just yesterday:
http://www.eoproducts.com/Categories/Hair/Shampoo.aspx
They had shampoo and conditioner in large 32 oz. bottles with a pump for $9.99. Not bad, IMO. Phalate-free, SLS free, etc.
I would've bought some BUT over the weekend I found 6 bottles of a similar brand (Hugo Naturals) on clearance for $2.99 each at Kroger grocery store of all places!