Email Reminder Service - Zen Cart

HI, Im looking for someone to do the following, Create a zen cart module which is displayed in the shopping cart and can be viewed in the admin area. The module will need to be able to select certain products/categories that the module will work with. Basically the module will allow the customer to select a time frame (3, 6, 12, 18 or 24 months) and based on the order date and time period selected, A generic email will automatically be sent to the customers email address entered in checkout as well as a copy to a generic email address for us to follow up. The module will be displayed in check out (I am using ajax one page checkout) and it will be displayed with the options above as well as a small block of text. As some products dont require replacement i need to be able to manually select what products/categories are eligible for a reminder. Its important that this is reliable and please only bid if you have knowledge with the zen cart system and modules. Please dont hesitate to ask if need more information. Thanks,