Cleintexec, Joomla & Virtuemart Gateway integration

Hi there. What we need is a real PHP Expert! We need to integrate Clientexec with Joomla for billing and managing clients and receiving order that are on EFT basis, then virtuemart and VCS for receiveing credit card payments. (VCS is a small script payment gateway). We have already design and setup the website and virtuemart store with the products. We just need someone who knows how to tie them all up together. The chosen person will need to sign a NDA as they will have access to very important passwords. No chancers! We have been scammed on this very project once already.