Big confectionery conglomerates.
Christians who want Christian themed candy can shop specialty or DIY frugal. In many cases boycott makes no sense because of the size of the necessary naughty lists. But here the purpose makes it self boycotting. Being ashamed of Easter will cost.
This company sells Easter candy, available at local Walgreens drug stores.
http://www.rmpalmer.com/easter/easter-candy/