To be honest, RV owner's manuals are usually very generic. An owner's manual out of a Jayco or a Forest River would be just as specific to your unit as one for a Sunset Trail. What is usually specific to your unit will be all the various equipment that comes with it, i.e. awning, air conditioner, water heater, range, TV and audio system, etc. That will usually be in a big package of paperwork stored somewhere in the RV. Have you looked everywhere in the unit? I found mine in my used Cruiser stuck in one of the dresser drawers in the bedroom.
Mike in Tennessee
2007 Cruiser 30QB
2008 Ford F250 Lariat 4x4 6.4 Powerstroke
Valley 16K slider
Ride-Rite air bags