I have accounts on all the audio drama casting websites and forums, and already a pretty big rolodex of talent.
Would you want talent to do at least a passing similarity to the actor's from the film?
Casting a good Lil' Annie would be really important. You'd probably want to consider a female to play him.
I have formatted audio drama scripts and a giant collection of sound FX (including a bunch of Star Wars ones) at your disposal sir.