I like joshsfrogs.com for a lot of my feeders, anything from Black soldier flies, Blue bottle flies, several sizes of crickets, super worms, hornworms egg crate flats ect.
Normally gout appears in the ankle area, I don't really see anything wrong with his back as you mentioned. My concern would be sleeping during the day, double check all the temp and humidity numbers both night and day to see if they match up with the guild you are using.
The LED uvb fixtures haven't really been tested enough with chameleons to say they work enough or not and even if they are safe. I would stick with the T5 until more research has been done with the LED.
My first panther was a rescue and on the days he had to poo he would eager walk onto my hand to come out and poo. The other days he would just sit and look at me 🤣