Bruce,
There's an off chance that the Benson Ford Research Library (the "Archives") has a Ford Engineering Drawing of the bag. Since you have the part-specific part number, you can make a request to see if they have the drawing. The lookup part is free. It would have all of the dimensional information and maybe the material specifications on the drawing. If they have the drawing, the cost is $30 for an electronic image. If you are interested in finding out, here's the email address to use:
[email protected]
The Archives has one person who will answer email questions so you will get a reply.