Authorize.net Donation Form for Joomla

I need a donation form to be programmed to work with Authorize.net. I currently have all requirements met for using Advanced Integration Method for transactions: SSL, cURL installed, [login to view URL] account in test mode with all code standing by and ready for a freelancer. Basic process that needs to occur is as follows: 1. Potential Donor visits secure page on Joomla site (can be coded as a straight php page and we'll use a wrapper to bring it in.) 2. Potential Donor enters all information required to process the transaction and submits form. 3. Form is processed by [login to view URL] and returns the response code which need to processed to deliver a confirmation or decline message. 4. Email(s) arrive at both donor and organization to inform of the donation. I will respond immediately with any further information you need to make an adequate decision. Thank you for your immediate attention.