Have you looked at any of the sporting good stores (sorry if that is a big box store terms change over the years)? Pro Bass and others usually keep something in their fridge for the fishermen that never stop fishing (no matter what the weather is). If not, what kind of chameleon do you have? My Veileds will eat veggies when hungry and I have read somewhere a person had a Panther eat some veggies (last resort type of stuff). Just make sure he or she is drinking plenty of water. I keep frozen crickets in freezer for emergency situations like this but then again I tweezer feed a lot (my therapy life line). Ha ha
Best of luck!
FYI: Since the pandemic, I have learned and breed crickets, superworm (slow growers), mealworms- a few different species and sizes (did not know there were micro meals all the way up to giants, all being different) along with fruit flies. I guess boredom used to its potential.
1# Fruit flies
2# mealworms
3# crickets laying eggs
4# cricket eggs (about 5000 hatched 13 days later)
5#Superworm separation container- they have to be alone to morph into beetles.
6# In the middle (looks like grain of rice but 1/4 the size) baby superworm 20 to 30 days after beetles hatched.
Sorry! I am educator and can't break the habit of over sharing.