PVL has a natural one and so does Allmax. I think Precision/Interactive may have one but I can't remember at the moment. I think BioX also. By natural I assume you mean sweatened with stevia not without flavor - is that correct?
My point is that there is more to it than just one side. There are many factors that go into pricing. However, the company that previously distributed ON was known to have higher margins.
SS