Hi i found http://tritoneapps.com where i got source codes for existing iphone games which are their at the app stores and these codes are available with complete instructions about the coding and i designed my own game with graphics assistance from their side

Yes, i will agree with rocky. http://tritoneapps.com provides source codes only for $5, they can provide graphics also..really nice work...

Seems like they have wide variety of games ...And source codes for just $5 ...thats never seen before...just amazing 

Checked it out and bought source code for a game called ballon shoot.. Works pretty fine.. Thinking of improving the app and releasing it for iPad.