The HTC Surround (TM) - Gray you're searching for is no longer available.
We Bing'd around the web some more and found the product page for the device on Telus, AT&T's Canadian BFF. The page clearly states in its header that the HTC 7 Surround is discontinued there as well.
While it's hardly surprising to see the Surround go considering that it was probably the weakest Windows Phone offering on AT&T, we are still sad to see it happen. It looks like the days for our beloved first-generation Windows Phones are numbered, but at least there's hope on the horizon for something better.
Source: AT&T, Telus