Someone’s come out with straight print proofs of the season 2 poster being found at WalMart, however they are slightly different. Most notably, the map of Equestria doesn’t have the Celestia & Luna caricatures in the top corners of the frame. Also, all but the map are 72dpi and are in a considerably lower resolution than NovalG’s scans. I requested that Seth reupload the posters in their full resolution; the links below have been updated.
Click the thumbnails below for the full resolution images.

If you’d really like to print these for a considerable amount, you can use a public commercial printing service such as FedEx Office.