Facebook Contest Data Capture

We are looking for a customizable scratch and win contest app. for Facebook. Functions required as follows: Participant must "like" to see the contest page Participant enters email address Participant moves mouse over scratch area to reveal a randomly generated prize amount from a pool of prizes Participant is then given the opportunity to share the contest on their wall to "double Up" the prize Participant is emailed the unique promo code with instructions We will need a functioning data base with a cross reference of emails to prizes awarded. We see this as a 3 page process: Landing page, Scratch Page, Thank you page Please respond with relevant experience in facebook applications, contests, etc.