I buy the cheapest CVS or Walgreens bottles that say "Aloe Vera [After Sun Moisturizer] ". Sometimes they're clear, sometimes green, sometimes blue. If this article is correct they probably don't have actual AV. But I'm not sure that matters, the key seems to be how quickly you get a first layer on, and how consistently throughout the next three days you baste the area affected with whatever it is I'm buying.
Uhh, if I bought a bottle of Aloe and was smearing it all over myself, and then I was told "That's not actually aloe", I'd want to know what I was applying to my skin before I applied any more. Sure, it works, but maybe it's carcinogenic, or has a side effect that I don't want to risk, or I have an allergy to whatever mock-aloe-substitute they used.