I got a shipment from capella flavorings after seeing their ad here. Its absolutely amazing how a couple drops gives a taste explosion... i think their cherry cola has a better and fresher taste than the coke or pepsi equivilent for instance. I wonder if there are other such vendors for super concentrated flavorings.
A slight caveat is that my tests werent exact because i had to sweeten with another flavor syrup, having nothing neutral on hand. Capella charges little to ship their tiny thumb size bottles, but the big ones incur a huge rate for here, so wondered if there are other such companies.