Hello,
I am able to provide you the xml feeds for Add/update/delete products using sku.
I dont have Amazon account, but will send you the xml files to test by yourself.
I have hands on experience with Amazon MWS and als eBay LMS to add products, update product info, delete product, get amazon orders, set shipment tracking numbers etc.
I am experienced on PHP, MySQL, CodeIgniter, Amazon MWS, eBay LMS, Magento, Wordpress etc.
Looking forward for your kinds response.
Regards,