I seem to be getting some symptom relief with licorice. I thought I would take Hv's advise and try Glycyrrhiza uralensis since it is less stimulating than Glycyrrhiza galabra. But where can I buy some in the US? I would prefer to buy the powdered root in bulk. If anyone can point me to a source, thanks.

I don't know of any retail sources off hand.  And it can be hard even finding it wholesale sometimes.  Best thing to do would be to run a search under "G, uralensis" and "pound" to narrow the search down to sellers instead of studies.