I called the archival department of the WPC organization at (313)252-2902. They do not have any build sheets, but they do have some other imformation for some cars on old IBM computer cards. If you call they will ask you for the serial# to see what is available and they will call you back to see what you would like to purchase if anything is available. This is the stage I am in right now. They also stated that the build sheets were not intended to be saved and if you have one you are indeed very fortunate as this information cannot be found today.
Steve Restelli
Webmaster, HistoryTV.net
http://historytv.net