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If you can get a developer to create a list of all the pages Google has crawled within a date range then you can use this python script to check if the page is indexed or not. http://searchengineland.com/check-urls-indexed-google-using-python-259773 The script uses the info: search feature to check the urls. You will have to install Python, Tor and Polipo for this to work. It is quite technical so if you aren't a technical person you may need help. Depending on how many URL's you have and how long you decide to wait before checking each URL, it can take a few hours.