I worked for NASCAR for a bunch of years and for part of my time there I focused on entertainment partnerships, including getting the sport into TV shows and films.
One year I got 3 drivers- Dale Jr., Tony Stewart and Kasey Kahne on The Cleveland Show- they played themselves in an episode where Cleveland and pals go to the race track and cause a bunch of trouble.
When the project was over I printed out an image from the episode- this isn’t a true cel, just a printout- and then had the drivers all sign it.
Cool memory, and I’d imagine a totally unique item!