I have over 8 years experience designing and developing data mining scripts to pull data from 1 or more sites including Google, Zillow, Craigslist, Ebay, Amazon, Facebook, Myspace and much more.
I can make a program that will let you select your Excel file using a dialog and then select the Column Name you have the data in and allow it to search Google or any given website for values.
I have 8+ years of experience designing and developing applications for Web, Mobile, Desktop and Tablets using C#, Java, VB, C++, PHP, HTML, CSS, JavaScript, Python and much more. To date I've been more than 100+ data mining tools almost exactly like what your asking for.
I can get this done very fast and most efficiently.
I'll provide you with the software I make and use to complete this so you may use it over and over again. I can also start right away and provide help for free in the future. Please, feel free to message me any questions you may have, I'd love to hear back about how I can help you more!