Sell them to me! No, but really, selling on Craigslist is probably the best option. Or online. Lots of people, me included, want very inexpensive and large lots of feeders.
While it hasn't been experience with chameleons, I have had bearded dragons for years using only liquid calcium-- I have provided it in the water source for feeders, on feeders, and on their veggies without any issue. I've also done the same with leopard geckos in their water bowl, since leaving...