Amazon API Script - PHP and MySQL

I need to update a local MySQL database with the title, publication year and some other information about all the books which fall under certain categories on Amazon.com. I need someone to write the script that handles the SOAP/REST transactions with the Amazon AWS API. I do not need make frequent queries to Amazon, but I will need to run the script regularly in order to update the local database with newly added titles. I prefer a PHP script. Ruby is also acceptable. If using PHP, I have some code to get you started (similarly for Ruby), so this job might take <1 hr to complete if you've done this kind of stuff before. This is why I would prefer to find someone who is already familiar with the Amazon API and MySQL. If you're interested, email me and we can talk price. Also let me know if you will be using Ruby or PHP.