Good idea. I'm not a movie maker so I don't know much about the business, but I'll investigate.
Good starting points would be the current leaders in getting movies onto iTunes and Netflix: KinoNation and http://www.distribber.com/ .
The situation for filmmakers is so bad that the latter's offer to take 3+ months to get a single movie into iTunes for the low, low price of $1295 was - rightly - considered to be a massive leap forward for filmmakers worldwide.