Need Domain look up script for my website

I need a domain script that will allow users in my website to look up for domain availability, no Registration needed. Total requirements: 1. Domain availability script will give results 2. User will click on check box to confirm domain choice 3. Domain will be added to " form or cart " 4. User will also have option to choose web package & other options 5. User will have to option to pay for package via Paypal or if not sure, will send request for package to recipient's email. ( Refer to attached image to understand 3 easy steps for script needed.) I only need someone that has done this type of work in the past. Good Feedback & good communication required to be chosen for this project. Escrow for winner. More work coming for good programmer.