Accredo ecommerce integration

We want an integration between Accredo ([login to view URL]) and an ecommerce solution. The client currently has Myob and Virtual Merchant, which is a locked down cart that allows users with login access to view and purchase their products. We want to create a replica of this system which integrates with Accredo instead. The integration can either occur between Accredo and Virtual Merchant or between Accredo and another ecommerce solution - we are open to suggestions on this. Accredo should push through prodcuts (titles, product codes, images, descriptions and stock) to the online shopping cart. The shopping cart then pushes back invoices/ removes off quantity as it is sold. The entire ecommerce should be locked down so that only their wholesalers have access. If we proceed with this project you must be willing to communicate via skype or phone and also be available to work at least 3 hours each day during NZ business hours (9 - 5 Monday to Friday) while completing the bulk of the development so that we are able to communicate.