Virtuemart module for rewarding customers

We are looking for someone to develop a virtuemart module / component that can be used as a Customer Reward Program. We have an online store and we want to make a saving system for our customers. Here are the most important rules for the module. *For every x amount they spent they get 1 point, etc…(this must be an option that we can modify) *Points may only rewarded automatic after the order is confirmed. -The user points mus be shown in the Customer Account like this You have currently xx points In the backend we want the following. *A list of all users that have points. *The ability to adjust the points and reset the points to 0. It is very important that the module is working 100% without critical bugs. If the developer could offer support for the future that would be a plus. The module/compoment must be easy to install, like any normal modlue.