It anybody is interested in history, look to Wiki for a very high interesting rabbit hole, with many twists and turns. The mystery is whether it is still grown in Mexico. An ex Confederate, Maury, was trying to establish colonies in Mexico for ex Confederates. The trouble was he teamed up with Emperor Maxmillian, who had a very short term in power. Pancho Villa and Juarez couldn't abide with them because the U.S. Army had been secretly supplying them. The largest settlement was to be called Carlota, and they had groves of Chichona, possibly in Yucatan, from seeds bought in the U.K. But I have unable to find a Mexican grown source.
Found lots of recipes for delicious sounding homemade/bar made tonic water, but make sure you follow the safety instructions. Quinine can become dangerous in high does. Tonic water contains very little quinine compared to the medical doses of old.