URGENT oscommerce - customisations

I have a client who needs the following implemented on his osCommerce site: Products limited by Postcode - ie certain products can only be purchased by individuals within certain postcodes (zipcodes for those unfamiliar with the term postcode) There are only a few products within the four categories, but they each have specific postcodes associated to them. Second part: Reduced admin access - need to allow the client to only see customers/orders/catalog admin modules BUT the full admin feature must remain for our purposes. This is an urgent project, but only bid if you are certain you can complete this quickly and accurately. Questions via PMB