Hi, Kipka! Phoenix worms are very high in calcium (you can also dust them to add to their calcium load) they are not so very different from wax worms that it would be a huge change for your chameleon. You can even get them at Pet Smart and PetCo. They are also called "Repti Worms" and "Calci Worms". I've seen them in "double packs" with super worms at both the big box stores. Check the date, if it's more than 2 weeks old, don't buy it. You can buy them from any number of providers.
They're super wiggly so very appealing to chameleons.
If you can do online ordering, Mulberry Farms will sell you both baby silkworms (and the stuff to keep them alive) and Phoenix worms....that might make the shipping worthwhile. Here's their link:
http://www.mulberryfarms.com/
I suggest the medium silkworms...they are up to an inch long which should be small enough for you baby and they come with 2 weeks worth of food.