When shipping is 26 for a 10 dollar order... I'd rather not order online. Maybe I hadn't found the right place to order from.
so order more at once?
You'll find that even getting superworms is cheaper in bulk than you are getting locally. and supers last a long time.
silkworms eggs you can hatch out in batches (breed them if you have the inclination, and your overall costs will go down)
butterworms last a good while.
regardless of the cost, I feel its important to provide variety, and you're not doing that. If you think about it, $40 is pretty cheap for feeding an exotic animal for a couple months. Compared even to decent food for a large dog, its not expensive to buy bugs.
There are some links to online suppliers here:
https://www.chameleonforums.com/blogs/sandrachameleon/171-where-buy-feeders-online.html
also consider the site sponsors
I also suggest you go to the pet store that sells the most reptiles, spiders and similar. chat with the owner. see if you can convince them to bring in silkworms, butterworms, etc. It will cost you more than online, but will give you the convenience. The bonus to the pet store is that they will draw more traffic from reptile, amphibian, spider and even some rodent, fish and bird owners. Which should result in more light bulbs and other supplies being purchased there.