sync amazon.co.uk stock with products in magento shop

Dear Freelancers, 1. I have a magento shop with cca 20,000 asins. Asins are same as on [login to view URL] site. 2. I want to have a script, which will update my magento products stock with the stock found on [login to view URL] (see Image 1 for clarification). 3. Script should run at least once a day, under daily updated proxy list servers. If there is a need to have 3rd party proxy list supplier, let me know which one is the best, so I can subscribe to its services. Need to run the script under proxy in order to avoid being banned from amazon.co.uk. 4. Script should check only the inventory of the seller [login to view URL] (and NOT other sellers). Please check attached image for clarification. 5. There are some cases where products are not available in [login to view URL] (sold out, ecc). In such cases, you will see the following messages on [login to view URL]: - In stock but may require an extra %% days to process - Usually ships in %% days - Usually ships in %% weeks - Not yet published/released or Available for Pre-order - Temporarily Out of Stock - Currently Unavailable where %% is changed with numeric value (see image 3 for clarification). In such cases, my magento updated stock should be 0. Your script should update my inventory only in case the following messages are displayed: - In Stock - Only %% left in stock. where 'In Stock' should set my magento product inventory to 20 pcs, and 'Only %% left in stock.' should set my magento product inventory to %% pcs, where %% is a numeric value (see image 2 for clarification). Thanks for your time. Wish you a successful bidding.