Amazon Product API script development

HI we need some final help with a PHP script that we developed that uses the Amazon Product API to import products into our prestashop site. Presently we are having difficulty getting all the size and color variants and to match with there own prices etc. So this is bid for getting just this one aspect to work. thanks We are on a strict budget and if you have great knowledge of the amazon api and are really good at PHP then there will be more work on this project. Our amazon script is hard to understand and the last person we hired could not figure it out very well. thanks