If you can’t source it, I’m not going to tell you that you SHOULD pretend to be a bottling company and ask a gum provider to send you some free samples, but you could and the amount they send you will last the rest of your life. TIC gums is pretty awesome and if you’re into frozen desserts has some incredible gum mixtures for ice creams, sorbets, etc.
Also, consider just using water soluble flavor concentrates and skipping emulsification all together. That’s what most pros do and it’s why Sprite isn’t cloudy like it would be if you used oils. My favorite suppliers that sell in consumer and pro-sumer qtys are Apex Flavors and Nature’s Flavors.
This probably won’t work for Cola as I think some of those ingredients have all of their flavor molecules in the oils, but as a general rule, if you can buy it at the store and it is clear, it is made using water soluble. If it is brown it probably isn’t, hence the caramel color additive.