Unfortunately, I think those needing a replacement mounting plate are out of luck. I just called and had an identical conversation. Customer service can't help; they're reading from a script. Another disappointing/useless answer from Google. And you're correct, neither Amazon or Best Buy have these parts, contrary to what the customer service script says. Seems dumb on Google's part—seems like a lot of folks are willing to pay them for a piece of plastic that probably cost them 25 cents—but its unsurprising; they're oblivious and don't care which is something to keep in mind when they're hawking expensive new Pixels and Nest Hubs in a few weeks.
