Hello Don -- Welcome to the Forums!
If you are looking for manuals, you could check for reproductions from Helen Davis at Secretarial Services, PO Box 484, Sidney, OH 45365 (937) 492-8885. High quality reprinted Service and Owners' Manuals are also available from the Airstream Store at Airstream, Inc :: Home
look under books. If you don't see the year(s) you need contact Airstream.
I own a 1974 24' Argosy sitting out on a farm near here. I've got the manual for mine; the same manual covered all length Argosy trailers for that year and has data on each. These are general operations manuals and not the service manual. With a glued spine it wouldn't scan or xerox very well.