You can't buy a parts & repair manual because there is none for the coach as a whole. You can get a chassis manual (it's either a Ford F53 or Chevy P30 chassis) and an engine manual (also Ford or Chevy). You can probably get service manuals for many of the major appliances, e.g. fridge, furnace, water heater and a/c form various online sources. Just Google the appliance make/model a plus 'service manual' and you will likely get hits.
Fleetwood will sell you a generic motorhome owner manual but its not worth the postage.
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL