Welcome to the boards
Your may want to check ebay out as well.
I know there is a company that reprints the shop manuals and sells them on ebay. You can also find a set of originals every once and a while. The same goes for littiture...they reproduce some things and list them on ebay as well. You can also find magazines etc. As for center caps, me and a few others are actually reproducing these caps if you can't find any. I ran in to a few snags but should be back to normal next week.
Ray