You could always design a shirt this way.
"You have a past great ahead of you!" - Silver Dollar City. So basically you are giving credit to them for the quote. Better yet, you could change the slogan slightly to read
You've got a great past ahead of you! That way it's not verbatim.
Changing topics slightly, the only shirts I am allowed to wear to work are polos, and button ups. I sure wish Silver Dollar City would put out some more classic shirts with the axe, and log logo on it. When I was there last month, I only found one polo shirt with the official logo on it, and it was a woman's polo! To say I was disappointed was an understatement.