Where can you get the Alabama shirt from Jason Aldean video shes country?

You can try looking for the Alabama shirt that Jason Aldean wears in his music video for "She's Country" online in online country or western themed online clothing stores, music memorabilia website. However, since this song and music video was released back in 2010; there maybe limited quantities or older designs available. You could also do a google reverse image search on the image showing the Alabama T-shirt.