Habs should be pretty easy to find at most grocery stores. If you have any local Mexican grocers or markets (or anywhere that may have a large population of Hispanic/Latin American clientele), you'd be almost certain to find some! I can find habs at all my local grocery stores, Mexican market, farm market (when in season), and even at Wal-Mart (and other 'mart' stores). They may not be as plentiful as jalapenos or other milder peppers... but they are out there!
Hello and welcome to THP from northern Kentucky. You can get habs at your local grocer but growing your own is so rewarding and much better tasting. Do yourself a favor and grow some MOA scotch bonnet peppers.