I bought them from sensiblehealth.com. I'm using their Liver/Gallbladder flush 4-pack.
The Chinese Bitters I believe was most important for me. Because it's meant to decongest the liver. Once I did that and started drinking apple juice for it's malic acid content the stones just started passing them self.
Also their herbs are in tincture form, which is by far the most effective for me compared to other forms. All depends on individuals though I suppose.