Joomla 2.5 Purchase order component

We are looking to create a private online ordering system : * Multiple Vendors * Ability to order across vendors but then create a separate purchase order for each vendor * Reconcile purchase orders * Potentially Vendor Access to list and update products * custom fields for product listings * Ability to charge commission from Vendor (with ability to exclude products from commission) with out customer seeing this. * Credit and refund management * Order by Product Category or by Vendor * FULL Admin control over vendors / products / credits etc. * Link to Joomla users - for ACL control * Ability to add user by store and function * Full reporting * Layout control for PDF creation and HTML view ajax drag and drop * Fully Secure