Let me start off by saying that my expertise is in domains proper – not websites and certainly not SEO. So I can't say with absolute certainty that a whois change won't affect Google rankings. Nobody CAN give you that kind of reassurance, since Google's algorithm is so inscrutable. What I can ...
There isn't one. You basically need to scape everyone for the data unless they give you an API. This gets pretty hard. I know a startup in Singapore that could probably help.
From the looks of it, you might have to hire a PHP developer from Elance or ODesk to write something custom. There are tools that can find the results but its going to hard for them to remove certain ones automatically.