Java web app / Amazon Web Service / Google App Engine

I already do have a Java/JSP web application that I had developed myself approx. 2 years ago. The purpose of that application is to build an e-commerce store that pulls the entire product catalog from the Amazon web service. So far this application worked smoothly until Amazon started to limit API access, as all requests are directly made against the API and no data is locally cached. Now, because of the API limitation this application needs to be extended, so that data is locally stored to avoid making too many requests to the API. Currently the application runs in a stand-alone container, but my idea is to port the application so that it can run on the Google App Engine and utilizes the datastore for storing all required data. Unfortunately I'm too busy myself with other projects, that's why I'm posting it here. You need to have very good knowledge of Amazon Web Services and Google App Engine, please provide links to projects you have worked on in the past that are utilizing these services. Also important is your experience in building web applications that are performant and search engine friendly. I estimate that someone who's got experience with these requirements can get this project completed within 4 to 5 days. Looking forward to your bids.