If you don't know how to obtain one, I doubt anything you find will be what you're after.
Unless I am over thinking this and you're just trying to browse to a website or something.
I'm trying to access Game Rewind on NFL.com, but it's only available in the US.
I tried a couple I found online, and it seems to work, but when I log in, it just keeps sending me back to the log in page, never actually logging me in. So, it must recognize I'm using some sort of proxy.