Where can I find food-grade beeswax to make Canelé?
@Adisak I was able to find one  source , although there may be many more.

I also found food grade paraffin wax, but it seems that it has a much lower melting point. 

After a little reading it seems that making canelés can be a quite tricky and meticulous process, so you probably want to stick with the beeswax. They do sound delicious!