Banks pay entities to be the "Official Bank of [insert team here]"
Regions used to be the Official Bank of the SEC, so you could get the SEC teams.
First Tennessee is the official bank of the Vols, so i would figure they would carry officially licensed logos, etc, on their cards
I work at Pinnacle National Bank and we just became the offical bank of the Titans, so we now have Titans debit cards
If you build your own card design, they won't get approved if they have any trademarked logos on them (Power T, VOLS, etc). The orange steps very well might work.