VirtueMart/Joomla Customization

I would like the following features added to my Virtuemart installation. 1. Display Options / Pricing for Categories - Each category should have the option of only displaying to registered users or shopper groups - Shopper group discounts should not apply to certain categories. Simple check box is fine. 2. Individual product sizing - When enabled, a product should have inventory control for sizes s-3xl - Users can easily buy any size - Easy for administrator to update sizes all at once (not interested in child products) 3. Reports per Shopper Group / Category - Ability to run reports per shopper group - Ability to run reports per category - Ability to run report of a certain group, purchasing a certain category 4. Thumbnail in Admin Inventory - A smaller thumbnail of product in admin inventory list - Remove Manufacturer from admin inventory list - Remove Review from admin inventory list 5. Low Stock indicator - The ability to of Virtuemart to email administrators when a product reaches a predetermined level (hard coded)