For the build sheet and window sticker, try calling REV Group. They generally decline to send technical information on pre-2013 coaches, but the build sheet and window sticker may be in other parts of their "system."
For wiring diagrams, send me a private message that contains your e-mail address and I'll mail you what I have.
2008 Holiday Rambler Admiral 30PDD (Ford F-53 chassis)
2009 Honda Fit Sport