Simple Amazon.com seller API scripts in PHP

Looking for someone to provide three simple PHP script functions to communicate via Amazon Marketplace Web Service (Amazon MWS). These scripts will be integrated into an existing online shopping site. Will consider other server-side scripting languages as long as an interface from PHP is provided. Code must be well commented, with no hard-coded values. SCRIPT #1 ============ Update Amazon product inventory Function inputs: product SKU, quantity to change (+1, -1, etc.) Function outputs: return status code from Amazon, quantity change in inventory Must include connect/disconnect from Amazon SCRIPT #2 ============ Retrieve Amazon buyer shipping/purchase info Function inputs: Order ID Function outputs: all product SKUs, shipping info (name, address, shipping type) in one comma-delimited string SCRIPT #3 ============ Update buyer shipping status Function inputs: Order ID, shipping type, tracking number Function outputs: return status code from Amazon, shipping status change in 'pending orders' list Milestone payments (1/3 each) provided for delivery of each script, after verified as working by us. See other similar job posting for ebay interface.