WHMCS Add on

Hi I require a multi brand module that allows me to use the same whmcs installation but generate 2 different carts with 2 different invoices and payment gateway that i can customized. I have 2 wordpress websites Website A Website B A single WHMCS installation tied to Website A I am looking to just seperate 3 things 1. Cart 2. Invoices 3. Payment Gateways For synergy both entities - share the same support team - share the same IT system. So all emails is from @[login to view URL] , whmcs installation - the branding of any IT related system that is invoices , cart, will still be via website A But because they are different entities - They have different invoice details to different entities - Website is different - Cart and products in cart is different - Payment Gate way different. 1. I have alreadychecked with modulegardens and this is not possible with their current multi-brand as it will conflict with the wordpress site. 2. I am currently checking with tools4isp.com. The preference is strongly towards a vendor with an existing script or a vendor who has worked with any existing script (e.g tools4isp multi-brand) and know how to customized this for my requirements. You will be required to provide full documentation in code as well as on paper. Interested bidder must clearly describe their approach to this job and highlight past projects with similar features/functions.