Mark (and others)
I have been in this club for over 45 years. During that time I have tried to save both K-F, Sears Roebuck & Co and Willys Motors/Willys-Overland factory correspondence that includes dealer ordering information, correspondence between factory and dealers or distributors, etc. to provide the same level of "service" to Willys vehicle owners that I can to K-F owners. There's been almost nothing available on Willys stuff compared to what I found for Kaiser-Frazer. I can't share what I don't have and could not get.
Rick Kamen had some better luck than I had but he is limited to the Aero Willys period and does try to help others with questions. Jim Betts recently uncovered a treasure trove of service bulletins 1952-1961 and has the great majority of them on his CIRCLEKF.COM website; the material can be downloaded as .PDF files. Other than the 3 of us, I don't know anyone else with a big collection of stuff who is willing to share. If you or anyone else on the forum has or knows of collectors with big collections and is willing to share info with others, please let me know.
Jack Mueller, KFOCI Historian