It's weird, I guess it's time for you to look for another store to buy that wheel. As I mentioned, some of the aftermarket wheels have a similar five-spoke design. You can check automotive stores like 4WheelOnline or check Google for more options.
It depends, you do not need to replace it if it is of good quality. You may check it yourself, I usually replace mine after 30,000 miles or once it begins to wear out. I always change my wheels and tires at once for a better discount.