What I hate about factory service manuals ...

drawing of what that particular tool looked like...
There were books that have listings of these tools. You can get only so much in a manual and dealerships did NOT carry every tool, if at all. Many listings are vintage now for our old iron, but many dealers had the books that either had the vehicle's logo or were from the toolmaker. I've seen some from the companies, such as Rotunda for Ford, Miller for Chrysler, and Kent-Moore for GM and IH. As posted earlier, the i-net can be a great resource, once you get past the ads and banners, and swap meets are good sources too.