Any ideas would be great.

Boxed pudding works great... You have to keep it in the frig until ready eat it .. It cant sit out any longer then 3 hours..

I have a bunch of different types of chocolate recipe fillings on my web site if you would like to look around there for something also..

http://www.cakecentral.com/cake_recipe_cat_46-Fillings.html

Thanks for the advice and the website.