Ajax order form and checkout for Joomla needed

Hi, I need four nice Web 2.0 AJAX based order forms and payment processing checkout designed to process orders on a Joomla 1.5 web site.? There will be four separate web design packages for sale on the web site.? Each package will have slightly different order form and checkout process. When people order a webdesign package online, we'll need to collect some details and process the payment through a 3rd party gateway. We will be using [login to view URL] as a payment processor.? We will also need a live "search for domain name" feature to have on all four forms.? The two cheaper packages will have users to enter all the texts they want to have on the web site, as well as upload images for us.? The other two packages will link to a form that will collect the contact details, credit card numbers, domain name etc - this will get emailed to us to arrange a meeting.? We're looking for someone to design a nicely styled web 2.0 form and take care of all the coding, including the payment processing integration.? Please have a look at the attached files? for outline of the checkout process for one of the packages and a mockup of the layout of the web site.