Amazon Inventory Management API project

We would like you to make Inventory Management System for AMAZON. We are selling our books on AMAZON, but it is hard to manage, so we would like to make the system which we can manage inventory on the WEB. you need to know about AMAZON API (AIM, product advertising api, etc) Pulling my inventory information from Amazon Seller Central on a daily (or hourly) basis. Amazon datas contains the ASIN, SKU, price and condition of each SKU/product, etc.. We want to change the price of book using this system. We want to update inventory information using this system. we know that the same kind of system are already existed, so if you already built the similar project, please let us know about it. we are japanese company and we like to publish the service within 2 months. you could use PHP, JAVA, PERL,,etc.