Drupal 7, product specific coupon code is needed

hi there, We have a Drupal 7 store. We would like to be able to create coupon codes that are product specific. Currently we can create coupon code (percentage or fixed amount), but they can only be applied to all the products at the store. Let's say we have product A, B, C, D in our store. Currently, no matter what coupon code we create, it will always applied to product A, B, C, and D. However, we want to create a coupon code that can be only applied to product A, but not B, C, D. In an other case, we may want to create a coupon code that can be used for product B, and C, but not for product A and D. There are some discussion on issues related to this task: [login to view URL] It seems it is not that ease to implement it. You definitely needs to be Drupal 7 expert and have strong code skills, which may be still not enough. You will need to have done the same task before to confidently say you can do it. Please bid with message stating if you have done the same project before or not. I do not want to waste either your time and my time.