yes you can get any part for your truck quick if there's scrappers around, might be able to find a burned out compressor in a week too .... the IR number is there so you can find out where to get parts and service, not to give consumers a personal expedited supply source, the 'run around' IR gave you was really just advising you to contact the point of purchase dealer, and as Tiny said, tractor supply may well have handed you the parts off showroom floor stock if you'd checked there
Bill