Mopar sells small spray cans of the Jeep paint colors. I hope they eventually add Reign as an option but it's not there currently:
https://www.quadratec.com/p/mopar/5-oz-paint?gclid=CjwKCAjwv4SaBhBPEiwA9YzZvJ8lvtJXSyINNtSyLiyYIdPPSvCWWmXB4IfMFgHl9afKKU9FnITN_RoCBqkQAvD_BwE