My point in writing this is to say- great job thinking outside the box! Even if you can't fly to Google HQ, continue to think outside the box. Some ideas include Hire someone at taskrabbit or Craigslist, or a FB jobs page, to go to their front desk, or if unsuccessful, to hold a sign on public property in front of Google's HQ, you can get a banner or sign professionally made (online process are pretty reasonably priced). You could Skype with your stand-in. It would be really fun to get a Skype video call on a big iPad... or try something else.
Everybody thought I was crazy. I was. Crazy people get noticed, and often get results. Whatever the outcome, being able to tell an awesome story is always fun! Good luck, mate!