Hi,
Yes, here it is. I will need to clean up and put it on the wiki, but you can get it now to start playing with it meanwhile. Dennis confirmed me few days ago that it runs well, so you should be fine. WARNING: you will need to read the full documentation from Apple and Prime31 to understand how to work with IAP to begin with. I haven't yet done a demo that follow the guideline, the scene is only about verifying each functions.
bye,
Jean