OUCH. Sorry about your problem. There are better deals out there but you need to find a small shop or mobile craftsman. I know your budget will take a hit, but I'd go ahead and order new axles loaded with brakes, just to preserve the new frame and all of your hard work.
Call Out of Doors Mart - I rather doubt that they can do it less expensively but they might refer you to a reputable restorer.
As for the manuals - check the www.airstream.com
website. Apparently they have put all of the manuals into .pdf format. I hope you'll be able to get an exact model of your whole frame.