How did you find an injector

I've been getting Botox for years and lately have been more and more dissatisfied with my results. Enough that I am starting to look for a new injector.
If you wanted the absolute best and price was not an important factor, what type of provider would you choose. Surgeon? Dermatologist? Other?
How did you find your injector? Nobody talks where I live or won't fess up. Or it's so obvious that I don't want to use their injector.

ETA: I've read that going to a Botox trainer is a good way to find an injector. But I am haven't figured out how to find trainers. Alle doesn't list (for good reason).