I have diagrams from a Mitchell repair manuel.I got it from my
library.Perhaps your library has this series of books.It is much larger
series than chiltons,and may only be at one branch of your city or county
library.. This is for the 85 vanagon.They have all the diagrams for all
years Dont know what a birds eye diagram is, but these are not like the
Bentley.They are acutally easy to follow,like all the other repair books
that I see for other cars.I would like to put these up on the list for
others  to download, but dont know how to , or have the equipment to do
so.If any one would like to help, I will fax them to you(I do know about
fax machines), and you can scan them.