222536 After-sales emails to customer

Its a small, elementary project and my budget is very tight on it. We sell health supplements on a retail site. We are looking for someone to design a script (could be perl or PHP) which can help us in post-sales confirmation/communication with the customer. When we receive an order, we have a tracking number after we ship it to the person. So we should be able to logon to a webpage and enter all details (like customer name, order number, date, shipping mode, tracking number, expected date of delivery etc) and then when we click on submit, it should automatically, send off an email to the customer in a pre-formatted way informing him of the tracking number and other details. Along with this... a) we should be able to change the format of the email (change the email template and content) b) each order entered into the system should be logged and we should be able to query on it. c) we should be able to define different email templates and then choose which email template has to be used to send an email. A kind of a post-sales order tracking and management system. The system should support multiple-users with login/passwords. Its a standard system and many programmers would have something similar. So I am looking for a very competitive bid. Regards, Puneet