I bring to you a whole new generator for you. This generator search in iTunes Database for unused codes and then register one of them in they server. After that, the code is ready for redeem. For avoiding abuse, there is a limit of how much you can use this program. So, if you try to generate two or more codes in less than an hour, you're going to get the same code over and over. This is because too much codes generated in a short period of time can be suspicious, so i put that limit.
When the installation is over, the generator will open automatically. You can find it in your desktop after that.