I recently bought the new Raspberry Pi Zero W, a new version of the Pi Zero with Wifi and Bluetooth, and a case for it. I did not know that the CPU had been moved slightly to accommodate the new networking chip, and neither did the clerks at the store where I bought it. As a result, the top of the case and the heat sink did not fit quite right. I sent a letter to C4Labs.net, the manufacturer to let them know. With no questions asked, they sent me the correct part for the new Pi, and even some spares. They were aware that the new Pi Zero W had moved the chip, and had a new top to fit it correctly.
I felt I should let anyone reading this know that Dustin Smith, the founder of C4 Labs is making great cases for the Raspberry Pi series of computers, and cares sincerely about the satisfaction of his customers. Check them out!