NAPA sells a bunch of them. Depends what resistance you need.
ICR13 ballast resistor is 1.8 ohms, ceramic body
https://www.napaonline.com/en/p/ECHICR13
ICR23 ballast resistor is 1.2 ohms, ceramic body
https://www.napaonline.com/en/p/ECHICR23
ICR37 ballast resistor is 1.6 ohms, ceramic body, metal mounting bracket
https://www.napaonline.com/en/p/ECHICR37