I know what you mean. I had a helluva time finding this cool old button when I was building my site.
There have been other, newer buttons, I've no idea where they've gone. I think this one's the best (except, perhaps, for the colors), and here it is if you want it.
You did, BTW, see this
page, didn't you? I know there aren't any buttons, but you can make your own if you like. yay.