used or nos...I got both of mine on Ebay etc..the latest one was a 4" remote bd with the air compressor etc half of the price of a new one.. the 5" remote pakbrake is from a medium duty setup..it is just the brake and new..got it years ago on ebay..it probably going on my first gen as i already have 5" stack and exhaust..and im gonna do onboard air setup with a old york air compressor etc..
Good luck best best is Ebay, Diesel forum classiifeds, craigs list, or word of mouth etc
thanks,
Deo