There is a small run book called "PINBALL COLLECTORS RESOURCE" by Donald Mueting and Robert Hawkins.. its available online only from the authors.
This book is recognised as THE book for games manufactured.. it has many hard to find games that are NOT listed on IPDB or in Pinball Compendium. It is a straight reference book that contains over 6000 games with information on each compiled over 25 years. It includes ALL war and post war conversion games including number manufactured etc - VERY VERY hard to find information.
Were you to use this book in any way, you would need to gain permission.. just email the authors and tell them about what you wish to do, they MIGHT grant you limited permission.
Book has an extensive list of notes beside each machine which will tell you if it was a conversion, has BG animation PF animation, add a ball etc.. everything you need to know except a picture - cant recommend this book enough!

Link to the book is here:

http://www.pinballcollectorsresource.com/

Best of luck...