not sure if you could paint over and then have someone air brush it, but you can purchase a bestop spare tire cover (denim preferred for air brushing) for around $28.00, and have it airbrushed by the same person who did mine.
What the dealer gave me:
Air brushing was done by a fellow in FL. I ordered the cover, and shipped it to him, and a week later, it was on the vehicle.
He had a hard time finding a 33" cover, so that is why I ordered and shipped. A stock size cover (31-32") he might have in stock.
What I replaced it with: