Look hard! I found 3 USA sets left at my local Sears. They are far and few in between. They had manufacturer dates of around 6/2013-ish.
Thanks for the advice. I found a USA set at a local store yesterday, but the price was back up to $279.99. The manager wouldn't work with me on the price, but I went to another Sears and that manager sold me a Chinese set at the $189 price. Took the Chinese set back to the other Sears and the manager was happy to exchange it for the USA set. Why in the heck he wouldn't just sell me the USA set at $189 to begin with I don't know. Obviously managers have quite a bit of discretion on things like that.
As an aside, and take this with a grain of salt because I've heard **** like this before, but the manager at the store that gave me the $189 price was really cool. I struck up a conversation with him about the USA vs. China issue, and he said that they would very soon be marketing sets again that are 100% made in the USA, but at a slightly higher cost premium (his example was that a $99 Chinese set would probably run about $125-130 for a USA version). I for one would gladly pay the extra.