I'm pretty sure they have them at all apple store and online. However, I do believe that the button on the mic part lack the clicking ability. So you can not stop, pause, fast forward or answer a call with these headphones.
You might want to try these: http://www.ilounge.com/index.php/ipod/review/ultimate-buds-apple-etymotic-er6i-iphone-earphones/
I checked two Applestores in Denver. One has neither and the other has the old ones without the button. And the new headset's button has clicking ability just like Apple's headset. Just make sure you are not getting the old ones whenever you buy them.