Directi Renewal Script

Were looking for a simple php domain name renewal script that uses the Directi API. The script needs 3 steps. Step 1) Customer enters their domain, its checked against the directi database to see if it can be renewed, if so then then the customer is taken to step 2, if the domain isnt in the database then the customer is referred to our accounts dept. Step 2) The customer enters there payment details which is emailed to our accounts department or they can pay with Paypal. Step 3) The domain is renewed using the Directi API. Thanks ~ Dave ~