I've had some trouble only one of the stores near me carry it and even then I almost missed it. Look low, that was what one of the center staff told me. Also, you could put in a request with customer service dept at your store and ask them if they could stock it. I've had some luck with that in the past.
I work at a grocery store & the company that brings it in for us said that their warehouse has been out of stock for over a month now. So it could have something to do with the company not producing enough or having some sort of issue in manufacturing.