I model price elasticity at the level of the given goods in the given company / business. However there's a big corpus of observational studies, especially in macroeconomy (like Economic Research Service by U.S. DEPARTMENT OF AGRICULTURE. I found no data with experimantal approach.
I appreciate the reference to the control experimental data on influence of price on quantity goods sold. E.g. at first week they setup price for cup of cofee 1$ then they sold 100 cups, then 2$ and they sold 75 cups (or mobile phones, loafs of bread, tonnes of sugar).