Do you have any roasters near your location who may have the Agtron roast color tile set that you're looking for? It's probably easier to borrow or rent something if you do it in person, face-to-face, instead of hoping that a total stranger (on-line) will trust you with something that's valued over $200.
But, you never know. We have lots of people who roast coffee on this Forum. Maybe someone will be willing to take the risk.