I completely agree with getting the baytril. Maybe your current vet will give you another anitbiotic. You can ask him for baytril instead. I would also ask if he can consult with an avian vet on the proper treatment.
If you can get the baytril from him, I would keep up the amoxicillin until you can get some baytril (Enrofloxacin).
You can also see if those vets you called before do emergency treatment. They may take a new patient that way, but it would cost a lot more.
You can also see if the person who helped you last time will help again. Offer some food, beer, money or such for their help. There are a lot of people who would seriously consider working for free food.