The ford dealer said I need to replace my distributor disc... not sure what the say is the disc. Also said it is only available through ford, what is the DISC?

More info about your vehicle and symptoms could help.
https://www.askmehelpdesk.com/cars-trucks/when-asking-about-your-vehicle-303903.html
Did you get a written estimate from the dealer regarding this "disc?"

Yes, they said it would be $106.hr labor and $50 in parts