The owner information package is simply a collection of manuals for the various appliances and systems, e.g. a/c, fridge, water heater, etc. You can find most of them online in pdf format and download. You just need to write down the make & model of each appliance and then go searching on the net. Here is one good source:
Owners Manuals
You may also want a chassis manual for the automotive part. It's probably a Ford E350 or E450 van cutaway chassis. You may have to buy that from Ford, or from an online supplier. Check ebay forst, though.
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Gary Brinck
2004 American Tradition; 2007 GMC Acadia
Homebase in the Ocala Nat'l Forest near Ocala, FL