if you all hurry, there are some wonderful truffle filled small Easter Eggs on clearance. Lindt
and Dove. also some yummy caramel filled ones from Nesle and reeses peanut butter filled. these would be perfect for your cupcakes since they are the small eggs.
When the CI board was in existence (it closed recently), several members had tried them and
gave them great reviews, with the ganache.
I've made them without the ganache only, and they're super chocolatey and rich, so it just depends on how rich you want them!